divide matrix with different sizes

hi i wanna divide two matrix with different size one of them have 2 rows and 54 columns and another one have 2 rows and 16 columns. I'm trying element by element to divide but it's not appropriate. please help me what should I do with something like for loop or that kind of things.

thanks for devote your time for me

Answer 1

[Walter Roberson]

If the two matrices are A and B then possibly you want A\B (which will be 54 x 16) or B\A (which will be 16 x 54)

[mohamad almasi]

hi wlter, thank for your attention actulay A/B. that A is 2x54 and B is 2x16

[Walter Roberson]

You cannot do A/B . The / operator, whose formal name is mrdivide documents,

The matrices A and B must contain the same number of columns.

What is the size of output that you want? And how do you want to define the output mathematically. If C were the result of the division, then for any given index J, K, what should C(J,K) be defined as?

[mohamad almasi]

your advice is really correct and useful. I cant divide with /. and I do it with \. but unfortunately it's seem not appropriate for running in .m file. i means I run my divided separately in command window, but they didn't run in my .m file script. Matrix dimensions must agree.

Error in estimate_vector3 (line 25) arr_x = x\T1; Error in start (line 179) left_vector=estimate_vector3(left_cord,t,50);

[Stephen23]

"unfortunately it's seem not appropriate for running in .m file"

Why would MATLAB not let you use MATLAB operators in a MATLAB function? Using MATLAB operations in MATLAB scripts and functions is not the problem. Check the dimensions of the variables before you call that command:

size(x)
size(T1)
 arr_x = x\T1

[Walter Roberson]

Your t appears to be mostly made up of toc() results. toc() is not measuring some kind of external time as the frames progress: toc() is measuring execution time of the MATLAB code itself, and those times can vary widely. For example,

>> tic;m = 6; toc
Elapsed time is 0.060407 seconds.
>> tic;m = 6; toc
Elapsed time is 0.000070 seconds.

Your use of toc for your t vector looks very suspicious to me.