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Matrix
Datafile can be in an ascii or binary matrix format. The matrix flag
indicates that the file is ascii, the binary or matrix binary stands for
a binary format. For details, see matrix ascii (p. ) and matrix binary (p. ).
Basic usage in splot:
splot 'a.dat' matrix
splot 'a.gpbin' {matrix} binary
Advanced usage in splot:
splot 'a.dat' matrix using 1:2:3
splot 'a.gpbin' {matrix} binary using 1:2:3
allows to transform the axes coordinates and the z-data independently.
Usage in plot:
plot `a.dat` matrix
plot `a.dat` matrix using 1:3
plot 'a.gpbin' {matrix} binary using 1:3
will plot rows of the matrix, while using 2:3 will plot matrix columns, and
using 1:2 the point coordinates (rather useless). Applying the every option
you can specify explicit rows and columns.
Example - rescale axes of a matrix in an ascii file:
splot `a.dat` matrix using (1+$1):(1+$2*10):3
Example - plot the 3rd row of a matrix in an ascii file:
plot 'a.dat' matrix using 1:3 every 1:999:1:2
(rows are enumerated from 0, thus 2 instead of 3).
Ethan Merritt
2007-03-03