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# Assigments has more non-singleton the dimensions than non-singleton subscript

Asked by Ty on 10 Oct 2013
Latest activity Answered by Walter Roberson on 10 Oct 2013

I am working filling a matrix and I have the prior error. See the following:

```function [MDA_matrix] = MDA_calc_V3(dmat,E_abs_matrix,timeofmeasu,sum_ROI,BACKGTime,f)
box_loc = 0;
```
```      num_x = size(dmat,1);
num_y = size(dmat,2);
tot_box = size(dmat,3);```
`      MDA_matrix = zeros(num_x,num_y,tot_box);`
```      for i=1:tot_box
for j=1:num_x
for k=1:num_y
%for i=1:x_num
%  for j=1:y_num
%% INTERMEDIATE CALCULATIONS
box_loc=box_loc+1;
sqrt_sum_ROI=sqrt(sum_ROI(box_loc));
sqrt_BACKGTime=sqrt(BACKGTime);
rate = sum_ROI(box_loc)/BACKGTime;
pm_rate= sqrt_sum_ROI/BACKGTime;
expected_value= rate*timeofmeasu;
pm_expected_value=pm_rate*timeofmeasu;
N_d=(4.65*sqrt(expected_value))+2.71;
%% MDA CALCULATION
E_abs = E_abs_matrix(j,k,i);
%MDA_matrix(j,k,i) = N_d /(f * E_abs_matrix(j,k,i) * timeofmeasu);
MDA_matrix(j,k,i) = N_d /(f * E_abs * timeofmeasu);
%%
end
end
end
end```

MDA_matrix is a 5x6x30 as E_abs_matrix, and dmat.

Any help.... thanks

```Assignment has more non-singleton rhs dimensions than non-singleton
subscripts
```
```Error in MDA_calc_V3 (line 27)
MDA_matrix(j,k,i) = N_d /(f * E_abs * timeofmeasu);
```
```Error in MDA_calc_All_cells_V2 (line 164)
[MDA_matrix] = MDA_calc_V3(dmat,E_abs_matrix,timeofmeasu,sum_ROI,BACKGTime,f);
```

Any help.... thanks

NO CLUE!!!

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Answer by Walter Roberson on 10 Oct 2013

Please tell is size() of each of the input variables.

And at the command prompt give the command

```dbstop if error
```

and then run your program. When it stops, tell it to display size() of N_d, F, and timeofmeasu

The error is telling you that you are trying to assign a vector of values into a single location.