CUSUM and CUMSUM, cusum not found

Hi,

I am using Matlab version 2015b.

I can use "cumsum", but not "cusum".

Is it because of different version?

cusum link: cusum matlab link

>> help cusum

cusum not found.

Use the Help browser search field to search the documentation, or
type "help help" for help command options, such as help for methods.

Did you mean:
>> help cumsum

[madhan ravi]

isn't https://www.mathworks.com/matlabcentral/answers/440576-error-in-using-load#comment_662271 related (similar)?

[Matlaber]

No.

This question is about why "cusum" is not working in my Matlab version 2015b.

Answer 1

[Image Analyst]

It was introduced into the Signal Processing Toolbox in release R2016a, a later release than what you have.

[Matlaber]

Thank you!

I am using Matlab version 2015b.

Is there any website where to upgrade my Matlab version?

[Image Analyst]

Yes MathWorks

[Matlaber]

i need to install the latest version which is 2018b

[Image Analyst]

OK, good. They usually sell you the latest version, which is what you want.

Answer 2

[dpb]

>> which -all cusum
C:\ML_R2017\toolbox\signal\signal\cusum.m
>> 

Your present release apparently doesn't have the Signal Processing TB in the license (or not yet installed)...

[Matlaber]

it shown below:

>>  which -all cusum
'cusum' not found.