MATLAB: Trouble with producing colorful images using pcolor command

matlab coderpcolor

I am recently using a new computer and a version of MATLAB 2011a is installed on it. When trying to produce images with the "pcolor" command from a fully rank 2-dimensional matrix, I just see a totally black figure without any image. The following error appears on the command window:

Exception in thread "AWT-EventQueue-0" java.lang.InternalError: HTHEME is null at sun.awt.windows.ThemeReader.paintBackground(Native Method) at sun.awt.windows.ThemeReader.paintBackground(Unknown Source) at com.sun.java.swing.plaf.windows.XPStyle$SkinPainter.paintToImage(Unknown Source) …

I have also recently updated the JAVA program to the final version of 7 (64 bit). It would be so kind of you to help me to fix this error.

Best Answer

So don't use pcolor at all. Despite me asking several times no one has ever told me why they want to use the deceptive pcolor instead of a normal display method that does what you expect. I don't like the way that pcolor has one less row and column than the array you're displaying and pixels with the same value won't get colored the same. Use imshow(), image(), or imagesc() instead.

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MATLAB: Do I receive a “java.lang.OutOfMemoryError: Java heap space” error after upgrading to Database Toolbox 3.5.1 (R2009a)

In Database Toolbox 3.5.1 (R2009a) the default value of the JDBC property 'defaultRowPrefetch' was changed from 10 to 10000. This change should increase the performance of the toolbox, however it will also increase the memory requirements of the toolbox.

To prevent the out of memory error from occuring, you can change this property back to its default value; below instructions for this are given for different versions of the toolbox:

To change the property in Database Toolbox 3.5.1 (R2009a):

After creating the connection:

conn = database(....);

Run the following code:

h = conn.Handle;
h.setDefaultRowPrefetch(10);

To change the property in Database Toolbox 3.6 (R2009b):

Run the following code:

setdbprefs('DefaultRowPrefetch','10')

MATLAB: How to use the own transfer function

I had the same problem. It is because nntraintool. So I disappear nntraintool while training process using below code,

net.trainParam.showWindow=0;

It worked for me.

I think this will help u.

Best Answer

Related Solutions

MATLAB: Do I receive a “java.lang​.OutOfMemo​ryError: Java heap space” error after upgrading to Database Toolbox 3.5.1 (R2009a)

MATLAB: How to use the own transfer function

Related Question

MATLAB: Do I receive a “java.lang.OutOfMemoryError: Java heap space” error after upgrading to Database Toolbox 3.5.1 (R2009a)