how to avoid the following error

how to overcome Undefined function 'sum' for input arguments of type 'function_handle'. Error in overall_throughput_Et = sum(sum(throughput_Et));

Answer 1

[Rik]

Apparently throughput_Et is a function handle, not a matrix. Watch out with your assignments so you don't overwrite any functions.

If you want more specific advice, post specific code.

Answer 2

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/375110-how-to-overcome-the-error#comment_520640