arrows

arrows(cmd0::String="", arg1=nothing; kwargs...)

Reads (x,y,a,b) data and make arrow plots. The input can either be a file name of a file with at least four columns, but optionally more, or an MxN array or GMTdatset object with the same characteristics in terms of number of columns.

This module is a subset of plot to make it simpler to draw arrow plots. So not all (fine) controlling parameters are listed here. For the finest control, user should consult the plot module.

Parameters

• B or axes or frame
  Set map boundary frame and axes attributes. Default is to draw and annotate left, bottom and vertical axes and just draw left and top axes. More at frame

• J or proj or projection : – proj=<parameters>
  Select map projection. More at proj

• R or region or limits : – limits=(xmin, xmax, ymin, ymax) | limits=(BB=(xmin, xmax, ymin, ymax),) | limits=(LLUR=(xmin, xmax, ymin, ymax),units="unit") | ...more
  Specify the region of interest. More at limits. For perspective view view, optionally add zmin,zmax. This option may be used to indicate the range used for the 3-D axes. You may ask for a larger w/e/s/n region to have more room between the image and the axes.

• G or markerfacecolor or MarkerFaceColor or mc or fill
  Select color or pattern for filling of symbols [Default is no fill]. Note that plot will search for fill and pen settings in all the segment headers (when passing a GMTdaset or file of a multi-segment dataset) and let any values thus found over-ride the command line settings (but those must be provided in the terse GMT syntax). See Setting color for extend color selection (including color map generation).

• W or pen=pen
  Set pen attributes for the arrow stem [Defaults: width = default, color = black, style = solid]. See Pen attributes

• arrow
  Direction (in degrees counter-clockwise from horizontal) and length must be found in columns 3 and 4, and size, if not specified on the command-line, should be present in column 5. The size is the length of the vector head. Vector stem width is set by pen. By default, a vector head of 0.5 cm is set but see Vector Attributes for overwriting this default and specifying other attributes. Note: when columns 3 and 4 the u,v components one must specify uv=true as an arrows option. Likewise, if they represent the arrows end points then use endpoint=true (or endpt). The default is also to plot arrow heads (with a shape=0.5). If no heads are wanted, use nohead=true.

• U or time_stamp : – time_stamp=true | time_stamp=(just="code", pos=(dx,dy), label="label", com=true)
  Draw GMT time stamp logo on plot. More at timestamp

• V or verbose : – verbose=true | verbose=level
  Select verbosity level. More at verbose

• X or xshift or x_offset : xshift=true | xshift=x-shift | xshift=(shift=x-shift, mov="a|c|f|r")
  Shift plot origin. More at xshift

• Y or yshift or y_offset : yshift=true | yshift=y-shift | yshift=(shift=y-shift, mov="a|c|f|r")
  Shift plot origin. More at yshift

• figname or savefig or name : – figname=name.png
  Save the figure with the figname=name.ext where ext chooses the figure image format.

Examples

Plot a single arrow with head and tail.

using GMT
arrows([0.0 0 5 5], limits=(0,5,0,5), figsize=10, frame=(annot=:a, grid=1),
       arrow=(start=:tail, stop=true), uv=true, fill=0, show=true)

See Also

plot, lines, scatter