Figure.wiggle(data=None, x=None, y=None, z=None, *, frame=None, position=None, color=None, projection=None, region=None, track=None, timestamp=None, verbose=None, pen=None, xshift=None, yshift=None, scale=None, binary=None, panel=None, nodata=None, find=None, coltypes=None, gap=None, header=None, incols=None, perspective=None, transparency=None, wrap=None, **kwargs)

Plot z=f(x,y) anomalies along tracks.

Takes a matrix, (x,y,z) triplets, or a file name as input and plots z as a function of distance along track.

Must provide either data or x/y/z.

Full option list at


  • B = frame

  • D = position

  • G = color

  • J = projection

  • R = region

  • T = track

  • U = timestamp

  • V = verbose

  • W = pen

  • X = xshift

  • Y = yshift

  • Z = scale

  • b = binary

  • c = panel

  • d = nodata

  • e = find

  • f = coltypes

  • g = gap

  • h = header

  • i = incols

  • p = perspective

  • t = transparency

  • w = wrap

  • x/y/z (1d arrays) – The arrays of x and y coordinates and z data points.

  • 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, z, respectively.

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

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

  • scale (str or float) – Gives anomaly scale in data-units/distance-unit. Append c, i, or p to indicate the distance unit (cm, inch, or point); if no unit is given we use the default unit that is controlled by PROJ_LENGTH_UNIT.

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

  • position (str) – [g|j|J|n|x]refpoint+wlength[+jjustify][+al|r][+odx[/dy]][+l[label]]. Defines the reference point on the map for the vertical scale bar.

  • color (str) – Set fill shade, color or pattern for positive and/or negative wiggles [Default is no fill]. Optionally, append +p to fill positive areas (this is the default behavior). Append +n to fill negative areas. Append +n+p to fill both positive and negative areas with the same fill. Note: You will need to repeat the color parameter to select different fills for the positive and negative wiggles.

  • track (str) – Draw track [Default is no track]. Append pen attributes to use [Default is 0.25p,black,solid].

  • 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

  • pen (str) – Specify outline pen attributes [Default is no outline].

  • 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

  • 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

  • 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

  • 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].

  • 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

  • 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).

  • 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

Examples using pygmt.Figure.wiggle