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<H3><A NAME="SECTION040261400000000000000"></A>
<A NAME="commands_plot_datafile_matrix"></A><A NAME="commands_splot_datafile_matrix"></A><A NAME="plot_datafile_matrix"></A><A NAME="splot_datafile_matrix"></A><A NAME="plot_matrix"></A><A NAME="splot_matrix"></A><A NAME="data-file_matrix"></A><A NAME="datafile_matrix"></A><A NAME="matrix"></A><A NAME="7787"></A>
<BR>
Matrix
</H3>
Datafile can be in an ascii or binary matrix format. The <B>matrix</B> flag
indicates that the file is ascii, the <B>binary</B> or <B>matrix binary</B> stands for
a binary format. For details, see <B>matrix ascii (p. <A HREF="node339.html#matrix_ascii"><IMG ALIGN="BOTTOM" BORDER="1" ALT="[*]" SRC="crossref.png"></A>)<A NAME="7792"></A></B> and <B>matrix binary (p. <A HREF="node337.html#matrix_binary"><IMG ALIGN="BOTTOM" BORDER="1" ALT="[*]" SRC="crossref.png"></A>)<A NAME="7794"></A></B>.
<P>
Basic usage in <B>splot</B>:
<BR>
<PRE>
splot 'a.dat' matrix
splot 'a.gpbin' {matrix} binary
</PRE>
<BR>
Advanced usage in <B>splot</B>:
<BR>
<PRE>
splot 'a.dat' matrix using 1:2:3
splot 'a.gpbin' {matrix} binary using 1:2:3
</PRE>
<BR>
allows to transform the axes coordinates and the z-data independently.
<P>
Usage in <B>plot</B>:
<BR>
<PRE>
plot `a.dat` matrix
plot `a.dat` matrix using 1:3
plot 'a.gpbin' {matrix} binary using 1:3
</PRE>
<BR>
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 <B>every</B> option
you can specify explicit rows and columns.
<P>
Example - rescale axes of a matrix in an ascii file:
<BR>
<PRE>
splot `a.dat` matrix using (1+$1):(1+$2*10):3
</PRE>
<BR>
<P>
Example - plot the 3rd row of a matrix in an ascii file:
<BR>
<PRE>
plot 'a.dat' matrix using 1:3 every 1:999:1:2
</PRE>
<BR>
(rows are enumerated from 0, thus 2 instead of 3).
<BR><HR>
<ADDRESS>
2010-08-17
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