f

#### plot matrix on log - log axis

```You would think that the two snippets below produce the same result. They do
not.

Number 1, this is the intended result where only axis values in the matrix
are log scaled
++++++++++++++++++++++++
#Set ranges
xmin=0.01
xmax=100
ymin=0.001
ymax=10
set xrange [log10(xmin):log10(xmax)]
set yrange [log10(ymin):log10(ymax)]
set xtics ("0.01" -2,"0.1" -1,"1" 0, "10" 1, "100" 2)
set ytics ("0.001" -3,"0.01" -2,"0.1" -1, "1" 0, "10" 1)

#Plot
plot 'foo.bin' binary nonuniform matrix using
(log10(column(1))):(log10(column(2))):3 with image

+++++++++++++++++++++++

Number 2, is the obvious solution where axis values and the column/row index
values are log scaled
+++++++++++++++++++++++
#Set ranges
xmin=0.01
xmax=100
ymin=0.001
ymax=10
set xrange [xmin:xmax]
set yrange [ymin:ymax]

set logscale xy

plot 'foo.bin' binary nonuniform matrix using 1:2:3 with image
++++++++++++++++++++++++

I don't know why gnuplot does the log scaling of indexes too. Is there a
reason for this? The second solution is much cleaner but gives a distorted
display. That display even contains faint (blanked) lines at each column/row
in the matrix.

Alex van der Spek

```
 0
Alex
3/19/2012 7:50:37 PM
comp.graphics.apps.gnuplot 5008 articles. 0 followers.

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