IDL CONTOUR PLOT COLORBAR

We also set the data range of the color bar with the Range keyword. Here is the correct URL:. A simple color bar. The levels on the color bar are exactly the same, but the colors are completely different! If the keyword is not set, the annotation is drawn in the color specified by the! Notify me of new posts via email.

Email required Address never made public. This keyword is only applied if the output is being sent to a Postscript file. In such situations, the Discrete keyword is often helpful. If you like, I can send you the Coyote Graphics commands I used to produce the plot, so you can see if I am correct. This puts the labels on top of the bar rather than under it. Here is the correct URL:

Mon Dec 7 For example, instead of the cgPlotS command above, I would use the cgPlot command.

If so, the cgDCBar program is available. Let’s suppose you want colors. This may be worth a separate post.

Discrete colorbar in (New) Graphics | The IDL Data Point

If you are not specifically setting the annotation color with the COLOR keywordit will probably be better NOT to set this keyword either, even if you are outputting to a color Postscript printer. Normally, when we label a color bar with pointed ends we mean that the first or last color include any value less than or greater than the nearest labeled value. Using cgColorbar To Produce Color Bars It is considerably easier to use the Coyote Library routine cgColorbar to create your color bars, because of its flexibility and it’s numerous features.

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Now visualize the mb geopotential height surface for January 1 as a filled contour plot, using a set of custom levels based on the data range: COLOR system variable usually this will be the color black.

You might specify its location like this:. Now, suppose you want the color bar to be the length of the contour plot, and positioned above it. To find out more, including how to control cookies, see here: The number of divisions to divide the bar into.

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First, load some colors. Here is how this program looks, displaying colors for the 12 months. You are commenting using your Facebook account. This keyword is only applied if the output is being sent to a Postscript file.

Here is the correct URL: Notify me of new posts via email. My code usually looks like this. It indicates that the Postscript device is configured for color output. Create a free website or blog at WordPress. Fixed a problem some machines have with plots that have no valid data range in them. I modified the code like this: You are commenting using your WordPress. The levels on the color bar are exactly the same, but the colors are completely different!

Email required Address never made public. A simple color bar. Vector which contain color’s indexes to trace in a color bar. Leave a Reply Cancel reply Enter your comment here This is often done, for example, when you are working with filled contour plots.

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You could do the same thing, but put the ticks outside and on top of the color bar. Now create a color bar.

It conour only to vertical color bars. I like to position my color bars in the graphics window with normalized coordinates, so that they go into any sized window. Substantially rewritten to go to screen or PostScript file without having to know much about the PostScript device or even what the current graphics device is.

Display the color bar in the window. June 29, at 7: This site uses cookies.

This is NOT the case with this function graphics contour plot or color bar. In general, this gives better looking output on non-color or gray-scale printers. To finish, annotate the visualization with continental outlines, a colorbar and some reference text:.

Output Contour Plot with Colorbar

I modified the code like this:. Honestly, I think the situation is even worse than I think it is. You can see many examples of plots with color bars of various sorts along with the code to create them in the Coyote Plot Gallery.