Saving a figure as a png with a specific name from predefined variable

I would like to save a figure as a png with the name as a value that I had already predefined in the code. The code below is not calling that value. My variable that I would like to use as the name of the png is defined as plottitle.

I keep getting an error that says invalid filename.

plottitle is my variable

saveas(gcf,plottitle.bmp)

Output: Error using saveas (line 96)

Invalid filename.

[Jan]

"Invaluid filename" is a surprising message. If plottitle is a string, which contains the name of the file, plottitle.bmp is interpreted as the access of the field bmp of a struct. Then the error message should be different.

It is recommended to post running examples. As soon as you show how plottitle is defined, the actual problem would be clear.

Answer 1

[Jan]

With some guessing:

saveas(gcf, [plottitle, '.bmp'])

[Jeremy Flint]

When I input that code I get the following error

Error using horzcat
Dimensions of matrices being concatenated are not consistent.

Error in Uniform_Plots (line 61)
saveas(gcf, [plottitle, '.bmp'])

However the following code does work:

saveas(gcf,p.Title{1,1},'bmp')

Thank you