more non-singleton rhs dimensions

I am getting an error here but I am not sure why.

I am trying to create a 1x5 matrix for the 5 c answers using the 5 t values in that matrix.

Thanks

[Jon]

Your screen shot shows some licensing page.

In any case please explain your question in words rather than a screen shot. The code button on the MATLAB answers toolbar allows you to paste in code and have it nicely formatted as in the MATLAB editor

[Matthew Gilroy]

Sorry I attatched the wrong screenshot this is the correct one

Thanks

[Star Strider]

Copy and past the actual code rather than an image of it, then highlight all of it and use the ‘Insert a line of code’ button to format it cortrectly.

[Matthew Gilroy]

x = (0:1:100)'; 'metres'
Ex = 0.02; 'm^2/s'
m = 1;
u = 0.5; 'm/s'
c = zeros(1,5);
t = [30, 60, 90, 120, 150];

for t = (1:5)
    c(1,t) = (m ./ (sqrt(4.*pi.*Ex.*t))).* exp(-((x - u.*t).^2)./(4.*Ex.*t));
end 

Answer 1

[Jon]

I'm thinking that you want to loop through your t values. You first assign t to the vector [30,60,90,120,150] but then reassign it in your for loop to (1:5) or [1 2 3 4 5]. You instead need to index your values of t inside of your loop something like

x = (0:1:100)'
Ex = 0.02
m = 1
u = 0.5
c = zeros(101,5)
t = [30,60,90,120,150];
for k = 1:5
    c(:,k) = m/sqrt(4*pi*Ex*t(k))*exp(-(x-u*t(k)).^2)./(4*Ex*t(k))
end

[Jon]

Note that the ".*" are only needed for element by element multiplication. You don't need that when you multiply scalars times vectors. Also I think you were trying to put in comments for the units. To do that you need to proceed them with a % sign e.g

Ex = 0.02; % m^2/s

[Matthew Gilroy]

Cheers this has worked thanks for the help.

Answer 2

[Matthew Gilroy]

Sorry I attatched the wrong screenshot this is the correct one

Thanks