Gnuplot cblabel not appearing

Question

I am trying to plot a function of two variables represented in tabular form. I would like to label my color bar while representing this as a heatmap. No matter how much I rescale, no luck, and I don't even see the colorbar label appearing. Here is my gnuplot script:

set title "Flux in core vs radius and height"
set view map
set cblabel "Neutron flux (cm^-2 s^-1)"
set xlabel "Radius (cm)"
set ylabel "Axial distance from center (cm)"
splot "flux.out" using 1:2:3 with image

And the result looks like this, lacking a colorbar label:

Answer 1

The cblabel is printed outside the picture. You can manually adjust the margins to make some space for the label:

set lmargin at screen 0.1
set rmargin at screen 0.7

I used at screen because else the picture would be cropped again. And I also set lmargin because else in my test the ylabel would not fit on the page.

Tested with Gnuplot 4.6.