How do you set the first column of a 4x4 matrix = a vector

Vector X [380 250 220 200]

Matrix C=

[1257 679 220 203 1567 155 234 432 2345 445 238 556] How do I set the first column of matrix C equal to x

[Rik]

You will probably benefit from a tutorial to get started with Matlab. One of the free options is Onramp.

Answer 1

[hosein Javan]

X = [380 250 220 200]
C=[1257 679 220 203
    1567 155 234 432
    2345 445 238 556];
C(1,:)=X; % set the first row of C equal to vector X

size of C = 3*4 , and size of X = 1*4. you can set the first row of C equal to X. if not, I assume it was:

X = [380; 250; 220; 200]
C=[1257 679 220
    203 1567 155
    234 432 2345
    445 238 556];
C(:,1)=X; % set the first column of C equal to vector X

[Vincent Ogonda]

Thank you first couple of days on Matlab trying to solve a problem

[hosein Javan]

you're welcome. that's fine.

[Vincent Ogonda]

Just another quick question if you have a 4x10 matrix. How do you set a loop from 2nd column to last column. Thanks

[Vincent Ogonda]

X = [380; 250; 220; 200] C=[1257 679 220 203 1567 155 234 432 2345 445 238 556]; C(:,1)=X; % set the first column of C equal to vector X

It worked for the row and not the column. Error in simulation it shows

[hosein Javan]

please copy and paste the code to your matlab command window. you have mistakenly defined matrix "C" as a row-vector rather than a 4*3 matrix. if you want to define a matrix in one line of code, use semicolon";" to distinguish rows.

C=[1257 679 220; 203 1567 155; 234 432 2345; 445 238 556];