??? Error: File: min_max.m Line: 3 Column: 32 Unexpected MATLAB operator.

Hi, i want to read a image file using function , and i have just written following 3 lines

what is the reason to show the error

function [min,max]= imread(moon.jpg)
ima=imread(moon.jpg); % reads in image
% display image
imshow(ima);

error is : ??? Error: File: min_max.m Line: 3 Column: 32 Unexpected MATLAB operator.

Answer 1

[Image Analyst]

This is a function declaration so you do not list actual argument values in the argument list when you are declaring your function. You use variable names and then pass in the actual values later, when you call it, not when you declare it. Also, don't use min, max, and imread for names of functions or variables since they are reserved built-in names. Do it this way:

function [minValue, maxValue] = my_imread(filename)
minValue = -1;  % Initialize
maxValue = -1;
if exist(filename, 'file')
  grayImage = imread(filename); % reads in image
  % display image
  imshow(grayImage);
  minValue = min(grayImage(:));
  maxValue = max(grayImage(:));
else
  errorMessage = sprintf('Error %s does not exist!', filename);
  uiwait(warndlg(errorMessage));
end

Then call it

[minValue, maxValue] = my_imread('moon.jpg')

[Varun Keshavan Bhaskara]

hey can you help me out with this projectile motion,, it says

" File: OpenANewFileExample.m Line: 21 Column: 19 Unexpected MATLAB expression."

My code is,

%% projectilemotion

clc

% pm_parameters

% constants

m1=0.15; %kg

m2=0.18; %kg

e=1.5; %mpa

h=1.8; %m

l=0.6;%m

deltal=0.16; %m

r=100; %m

g = 9.81; %m/s^2

theta=45*pi/180; %rad

function[C,Ceq]=pm_nlconst(x)

a=x(1);

v0=x(2);

d=sqrt((v0*v0*m2*4l)/(deltal*deltal*pi*e));

c1 = (sqrt((deltal^2*k*0.5*2)/(m2)))/v0;

c2=((pi*d*d)/4)/a;

C=[c1,c2];

Ceq=[];

end

function[out] = pm(x)

a=x(1);

v0=(x2);

out= ((pi*d*d*e*deltal)/(4*l*0.33));

end

Answer 2

[Azzi Abdelmalek]

Use

im=imread('moon.jpg')

Do not use min and max as variables (they are Matlab functions). The same remark for your function name:

For example write

function [min1,max1]= image_read(moon.jpg)
ima=imread('moon.jpg'); % reads in image
% display image
imshow(ima);
% your code

Answer 3

[Uni Lübeck]

Hey thank you very for your answer. its really helpful.