generating a more detailed contour plot

hello, I am using contourf to plot a color map for a Xi squared table. but since the lowest values are very low, and some values are very high, the resolution is not good enough.

How can I get a higher reolution plot?

Answer 1

[Jon]

If you want more contor lines (is this what you mean by resolution?) you can use the additional levels argument to do this, so for example if you wanted contour lines for 100 different levels

contour(Z,100)

or

contour(X,Y,Z,100)

[Tal Shavit]

it's a color map.

is it the same?

[Jon]

You can also specify a vector of values of the levels you want plotted. If the data has a large range of orders of magnitude you could specify a logarithmically spaced vector of levels like this,

zmin = 0.1; % what ever value you want for the first contour level
zmax = 1000; %  what ever value you want for the last contour level
levels = logspace(zmin,zmax);
contour(Z,levels)

[Jon]

For color map (filled) just use the above with contourf instead of contour

[Tal Shavit]

Thank you!

[Jon]

Your welcome. If that answered your question then please accept the answer. That will take it off of the list of unanswered questions, and let others with a similar question know an answer is available. Thanks