"Undefined function or variable 'imsplit'."

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Thulitha Theekshana
编辑： per isakson 2019-7-17
I am using Matlab 2015a and it says "Undefined function or variable 'imsplit'." when I run my code. Is this function not deifned in matlab 2015a ? If not, what is the best alternative for "imsplit" in 2015a ?
Also, I have been coming across so many functions that I found undifined in 2015 that are actually released in other versions. Is there a place I could find all of them at one place ?

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Walter Roberson
Walter Roberson 2019-7-17
编辑：Walter Roberson 2019-7-17
https://www.mathworks.com/help/images/ref/imsplit.html
Requires R2018b
You should be using the "doc" function in your MATLAB release to find the functions available in your release.
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Walter Roberson
Walter Roberson 2019-7-17
Indexing is an excellent substitute for imsplit
R = YourImage(:, :, 1);
Walter Roberson
Walter Roberson 2019-7-17
I do not know of any mapping such as you describe.
There have been many many new functions in the toolboxes. The number of functions available through matlab is over 50000 if I recall correctly. There are 77 or more new functions for image processing between R2015a and r2019a, not counting any new classes.

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per isakson
per isakson 2019-7-17
编辑：per isakson 2019-7-17
Maybe Imsplit, Split image or matrix into subparts using simple syntax by Jurgen. (Created with R2008a) of the File Exchange
"Is there a place I could find all of them at one place" AFAIK: The release notes is the best place there is.

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