This is only the part of the coding. The error from the command windows said that: Error in existing (line 9) [Iout, intensity] = optimizati​on_tech(I,​4,'pso') ;

How to solve this coding?

clc close all clear all [namefile, pathname]= uigetfile({'*.bmp;*.tif;*.tiff;*.jpg;*.jpeg;*.png;','IMAGE Files (*.bmp;*.tif;*.tiff;*.jpg;*.jpeg;*.png;)'}); [I,map]=imread(namefile); A=I; disp('Parameters for PSO Enhanced Image') tic; [Iout, intensity] = optimization_tech(I,4,'pso') ; toc; PSOOUT = Iout+(I/2);