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3.26.1.4 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‘ and ‘matrix binary‘.
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).
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