pygmt.Figure.plot

Figure.plot(data=None, x=None, y=None, size=None, direction=None, *, straight_line=None, frame=None, cmap=None, offset=None, error_bar=None, connection=None, color=None, intensity=None, projection=None, close=None, no_clip=None, region=None, style=None, timestamp=None, verbose=None, pen=None, xshift=None, yshift=None, zvalue=None, aspatial=None, binary=None, panel=None, nodata=None, find=None, coltypes=None, gap=None, header=None, incols=None, label=None, perspective=None, transparency=None, wrap=None, **kwargs)

Plot lines, polygons, and symbols in 2-D.

Takes a matrix, (x,y) pairs, or a file name as input and plots lines, polygons, or symbols at those locations on a map.

Must provide either data or x/y.

If providing data through x/y, color can be a 1d array that will be mapped to a colormap.

If a symbol is selected and no symbol size given, then plot will interpret the third column of the input data as symbol size. Symbols whose size is <= 0 are skipped. If no symbols are specified then the symbol code (see style below) must be present as last column in the input. If style is not used, a line connecting the data points will be drawn instead. To explicitly close polygons, use close. Select a fill with color. If color is set, pen will control whether the polygon outline is drawn or not. If a symbol is selected, color and pen determines the fill and outline/no outline, respectively.

Full option list at https://docs.generic-mapping-tools.org/latest/plot.html

Aliases:

  • A = straight_line

  • B = frame

  • C = cmap

  • D = offset

  • E = error_bar

  • F = connection

  • G = color

  • I = intensity

  • J = projection

  • L = close

  • N = no_clip

  • R = region

  • S = style

  • U = timestamp

  • V = verbose

  • W = pen

  • X = xshift

  • Y = yshift

  • Z = zvalue

  • a = aspatial

  • b = binary

  • c = panel

  • d = nodata

  • e = find

  • f = coltypes

  • g = gap

  • h = header

  • i = incols

  • l = label

  • p = perspective

  • t = transparency

  • w = wrap

Parameters
  • data (str or numpy.ndarray or pandas.DataFrame or xarray.Dataset or geopandas.GeoDataFrame) – Pass in either a file name to an ASCII data table, a 2D numpy.ndarray, a pandas.DataFrame, an xarray.Dataset made up of 1D xarray.DataArray data variables, or a geopandas.GeoDataFrame containing the tabular data. Use parameter incols to choose which columns are x, y, color, and size, respectively.

  • x/y (float or 1d arrays) – The x and y coordinates, or arrays of x and y coordinates of the data points

  • size (1d array) – The size of the data points in units specified using style. Only valid if using x/y.

  • direction (list of two 1d arrays) – If plotting vectors (using style="V" or style="v"), then should be a list of two 1d arrays with the vector directions. These can be angle and length, azimuth and length, or x and y components, depending on the style options chosen.

  • projection (str) – projcode[projparams/]width. Select map projection.

  • region (str or list) – xmin/xmax/ymin/ymax[+r][+uunit]. Specify the region of interest.

  • straight_line (bool or str) – [m|p|x|y]. By default, geographic line segments are drawn as great circle arcs. To draw them as straight lines, use straight_line=True. Alternatively, add m to draw the line by first following a meridian, then a parallel. Or append p to start following a parallel, then a meridian. (This can be practical to draw a line along parallels, for example). For Cartesian data, points are simply connected, unless you append x or y to draw stair-case curves that whose first move is along x or y, respectively.

  • frame (bool or str or list) – Set map boundary frame and axes attributes.

  • cmap (str) – File name of a CPT file or a series of comma-separated colors (e.g., color1,color2,color3) to build a linear continuous CPT from those colors automatically.

  • offset (str) – dx/dy. Offset the plot symbol or line locations by the given amounts dx/dy [Default is no offset]. If dy is not given it is set equal to dx.

  • error_bar (bool or str) – [+b|d|D][+xl|r|x0][+yl|r|y0][+ppen]. Draw symmetrical error bars. Full documentation is at https://docs.generic-mapping-tools.org/latest/plot.html#e.

  • connection (str) –

    [c|n|r][a|f|s|r|refpoint]. Alter the way points are connected (by specifying a scheme) and data are grouped (by specifying a method). Append one of three line connection schemes:

    • c : Draw continuous line segments for each group [Default].

    • r : Draw line segments from a reference point reset for each group.

    • n : Draw networks of line segments between all points in each group.

    Optionally, append the one of four segmentation methods to define the group:

    • a : Ignore all segment headers, i.e., let all points belong to a single group, and set group reference point to the very first point of the first file.

    • f : Consider all data in each file to be a single separate group and reset the group reference point to the first point of each group.

    • s : Segment headers are honored so each segment is a group; the group reference point is reset to the first point of each incoming segment [Default].

    • r : Same as s, but the group reference point is reset after each record to the previous point (this method is only available with the connection="r" scheme).

    Instead of the codes a|f|s|r you may append the coordinates of a refpoint which will serve as a fixed external reference point for all groups.

  • color (str or 1d array) – Select color or pattern for filling of symbols or polygons [Default is no fill]. color can be a 1d array, but it is only valid if using x/y and cmap=True is also required.

  • intensity (float or bool or 1d array) – Provide an intensity value (nominally in the -1 to +1 range) to modulate the fill color by simulating illumination. If using intensity=True, we will instead read intensity from the first data column after the symbol parameters (if given). intensity can also be a 1d array to set varying intensity for symbols, but it is only valid for x/y pairs.

  • close (str) – [+b|d|D][+xl|r|x0][+yl|r|y0][+ppen]. Force closed polygons. Full documentation is at https://docs.generic-mapping-tools.org/latest/plot.html#l.

  • no_clip (bool or str) – [c|r]. Do NOT clip symbols that fall outside map border [Default plots points whose coordinates are strictly inside the map border only]. The parameter does not apply to lines and polygons which are always clipped to the map region. For periodic (360-longitude) maps we must plot all symbols twice in case they are clipped by the repeating boundary. no_clip=True will turn off clipping and not plot repeating symbols. Use no_clip="r" to turn off clipping but retain the plotting of such repeating symbols, or use no_clip="c" to retain clipping but turn off plotting of repeating symbols.

  • style (str) – Plot symbols (including vectors, pie slices, fronts, decorated or quoted lines).

  • pen (str) – Set pen attributes for lines or the outline of symbols.

  • timestamp (bool or str) – Draw GMT time stamp logo on plot.

  • verbose (bool or str) –

    Select verbosity level [Default is w], which modulates the messages written to stderr. Choose among 7 levels of verbosity:

    • q - Quiet, not even fatal error messages are produced

    • e - Error messages only

    • w - Warnings [Default]

    • t - Timings (report runtimes for time-intensive algorithms)

    • i - Informational messages (same as verbose=True)

    • c - Compatibility warnings

    • d - Debugging messages

  • xshift (str) – [a|c|f|r][xshift]. Shift plot origin in x-direction.

  • yshift (str) – [a|c|f|r][yshift]. Shift plot origin in y-direction. Full documentation is at https://docs.generic-mapping-tools.org/latest/gmt.html#xy-full.

  • zvalue (str) – value|file. Instead of specifying a symbol or polygon fill and outline color via color and pen, give both a value via zvalue and a color lookup table via cmap. Alternatively, give the name of a file with one z-value (read from the last column) for each polygon in the input data. To apply it to the fill color, use color="+z". To apply it to the pen color, append +z to pen.

  • aspatial (bool or str) – [col=]name[,…]. Control how aspatial data are handled during input and output. Full documentation is at https://docs.generic-mapping-tools.org/latest/gmt.html#aspatial-full.

  • binary (bool or str) –

    i|o[ncols][type][w][+l|b]. Select native binary input (using binary="i") or output (using binary="o"), where ncols is the number of data columns of type, which must be one of:

    • c - int8_t (1-byte signed char)

    • u - uint8_t (1-byte unsigned char)

    • h - int16_t (2-byte signed int)

    • H - uint16_t (2-byte unsigned int)

    • i - int32_t (4-byte signed int)

    • I - uint32_t (4-byte unsigned int)

    • l - int64_t (8-byte signed int)

    • L - uint64_t (8-byte unsigned int)

    • f - 4-byte single-precision float

    • d - 8-byte double-precision float

    • x - use to skip ncols anywhere in the record

    For records with mixed types, append additional comma-separated combinations of ncols type (no space). The following modifiers are supported:

    • w after any item to force byte-swapping.

    • +l|b to indicate that the entire data file should be read as little- or big-endian, respectively.

    Full documentation is at https://docs.generic-mapping-tools.org/latest/gmt.html#bi-full.

  • panel (bool or int or list) – [row,col|index]. Select a specific subplot panel. Only allowed when in subplot mode. Use panel=True to advance to the next panel in the selected order. Instead of row,col you may also give a scalar value index which depends on the order you set via autolabel when the subplot was defined. Note: row, col, and index all start at 0.

  • nodata (str) – i|onodata. Substitute specific values with NaN (for tabular data). For example, d="-9999" will replace all values equal to -9999 with NaN during input and all NaN values with -9999 during output. Prepend i to the nodata value for input columns only. Prepend o to the nodata value for output columns only.

  • find (str) – [~]“pattern” | [~]/regexp/[i]. Only pass records that match the given pattern or regular expressions [Default processes all records]. Prepend ~ to the pattern or regexp to instead only pass data expressions that do not match the pattern. Append i for case insensitive matching. This does not apply to headers or segment headers.

  • coltypes (str) – [i|o]colinfo. Specify data types of input and/or output columns (time or geographical data). Full documentation is at https://docs.generic-mapping-tools.org/latest/gmt.html#f-full.

  • gap (str or list) –

    x|y|z|d|X|Y|Dgap[u][+a][+ccol][+n|p]. Examine the spacing between consecutive data points in order to impose breaks in the line. To specify multiple criteria, provide a list with each item containing a string describing one set of criteria.

    • x|X - define a gap when there is a large enough change in the x coordinates (upper case to use projected coordinates).

    • y|Y - define a gap when there is a large enough change in the y coordinates (upper case to use projected coordinates).

    • d|D - define a gap when there is a large enough distance between coordinates (upper case to use projected coordinates).

    • z - define a gap when there is a large enough change in the z data. Use +ccol to change the z data column [Default col is 2 (i.e., 3rd column)].

    A unit u may be appended to the specified gap:

    • For geographic data (x|y|d), the unit may be arc d(egree), m(inute), and s(econd), or (m)e(ter), f(eet), k(ilometer), M(iles), or n(autical miles) [Default is (m)e(ter)].

    • For projected data (X|Y|D), the unit may be i(nch), c(entimeter), or p(oint).

    Append modifier +a to specify that all the criteria must be met [default imposes breaks if any one criterion is met].

    One of the following modifiers can be appended:

    • +n - specify that the previous value minus the current column value must exceed gap for a break to be imposed.

    • +p - specify that the current value minus the previous value must exceed gap for a break to be imposed.

  • header (str) –

    [i|o][n][+c][+d][+msegheader][+rremark][+ttitle]. Specify that input and/or output file(s) have n header records [Default is 0]. Prepend i if only the primary input should have header records. Prepend o to control the writing of header records, with the following modifiers supported:

    • +d to remove existing header records.

    • +c to add a header comment with column names to the output [Default is no column names].

    • +m to add a segment header segheader to the output after the header block [Default is no segment header].

    • +r to add a remark comment to the output [Default is no comment]. The remark string may contain \n to indicate line-breaks.

    • +t to add a title comment to the output [Default is no title]. The title string may contain \n to indicate line-breaks.

    Blank lines and lines starting with # are always skipped.

  • incols (str or 1d array) –

    Specify data columns for primary input in arbitrary order. Columns can be repeated and columns not listed will be skipped [Default reads all columns in order, starting with the first (i.e., column 0)].

    • For 1d array: specify individual columns in input order (e.g., incols=[1,0] for the 2nd column followed by the 1st column).

    • For str: specify individual columns or column ranges in the format start[:inc]:stop, where inc defaults to 1 if not specified, with columns and/or column ranges separated by commas (e.g., incols="0:2,4+l" to input the first three columns followed by the log-transformed 5th column). To read from a given column until the end of the record, leave off stop when specifying the column range. To read trailing text, add the column t. Append the word number to t to ingest only a single word from the trailing text. Instead of specifying columns, use incols="n" to simply read numerical input and skip trailing text. Optionally, append one of the following modifiers to any column or column range to transform the input columns:

      • +l to take the log10 of the input values.

      • +d to divide the input values by the factor divisor [Default is 1].

      • +s to multiple the input values by the factor scale [Default is 1].

      • +o to add the given offset to the input values [Default is 0].

  • label (str) – Add a legend entry for the symbol or line being plotted. Full documentation is at https://docs.generic-mapping-tools.org/latest/gmt.html#l-full.

  • perspective (list or str) – [x|y|z]azim[/elev[/zlevel]][+wlon0/lat0[/z0]][+vx0/y0]. Select perspective view and set the azimuth and elevation angle of the viewpoint. Default is [180, 90]. Full documentation is at https://docs.generic-mapping-tools.org/latest/gmt.html#perspective-full.

  • transparency (int or float) – Set transparency level, in [0-100] percent range [Default is 0, i.e., opaque]. Only visible when PDF or raster format output is selected. Only the PNG format selection adds a transparency layer in the image (for further processing). transparency can also be a 1d array to set varying transparency for symbols, but this option is only valid if using x/y.

  • wrap (str) –

    y|a|w|d|h|m|s|cperiod[/phase][+ccol]. Convert the input x-coordinate to a cyclical coordinate, or a different column if selected via +ccol. The following cyclical coordinate transformations are supported:

    • y - yearly cycle (normalized)

    • a - annual cycle (monthly)

    • w - weekly cycle (day)

    • d - daily cycle (hour)

    • h - hourly cycle (minute)

    • m - minute cycle (second)

    • s - second cycle (second)

    • c - custom cycle (normalized)

    Full documentation is at https://docs.generic-mapping-tools.org/latest/gmt.html#w-full.

Examples using pygmt.Figure.plot

Cartesian, circular, and geographic vectors

Cartesian, circular, and geographic vectors

Cartesian, circular, and geographic vectors
Generate points along great circles

Generate points along great circles

Generate points along great circles
Line colors with a custom CPT

Line colors with a custom CPT

Line colors with a custom CPT
Line fronts

Line fronts

Line fronts
Line styles

Line styles

Line styles
Roads

Roads

Roads
Vector heads and tails

Vector heads and tails

Vector heads and tails
Basic geometric symbols

Basic geometric symbols

Basic geometric symbols
Color points by categories

Color points by categories

Color points by categories
Custom symbols

Custom symbols

Custom symbols
Datetime inputs

Datetime inputs

Datetime inputs
Multi-parameter symbols

Multi-parameter symbols

Multi-parameter symbols
Points

Points

Points
Points with varying transparency

Points with varying transparency

Points with varying transparency
Scatter plots with a legend

Scatter plots with a legend

Scatter plots with a legend
Text symbols

Text symbols

Text symbols
Vertical or horizontal bars

Vertical or horizontal bars

Vertical or horizontal bars
Sampling along tracks

Sampling along tracks

Sampling along tracks
Double Y axes graph

Double Y axes graph

Double Y axes graph
Blockmean

Blockmean

Blockmean
Inset map showing a rectangular region

Inset map showing a rectangular region

Inset map showing a rectangular region
Legend

Legend

Legend
Plotting data points

Plotting data points

Plotting data points
Plotting lines

Plotting lines

Plotting lines
Plotting datetime charts

Plotting datetime charts

Plotting datetime charts
Plotting vectors

Plotting vectors

Plotting vectors
Cartesian linear

Cartesian linear

Cartesian linear
Cartesian logarithmic

Cartesian logarithmic

Cartesian logarithmic
Cartesian power

Cartesian power

Cartesian power