Error using sum Dimension argument must be a positive integer scalar, a vector of unique positive integers, or 'all'.

I am attempting to do this calculation:

 VRTemp=((sum(ATretreive{1,7:10})/4)*100)-273;
 

But I then receive this error:

 Error using sum
Dimension argument must be a positive integer scalar, a vector of unique positive integers, or 'all'.

I first use:

ATdata=uitable(uifigure,'ColumnName',{'Test date'; 'Accel S/N' ;'Accel_0' ;'Accel_90'; 'Accel_180'; 'Accel_270';...
    'Temp_0' ;'Temp_90'; 'Temp_180' ;'Temp_270'},'Data',ATdatac);
ATretreive= get(ATdata,'Data');

in order to obtain and extract the data.

How should I correct this error?

Answer 1

[Walter Roberson]

sum(ATretreive{1,7:10})

ATretrieve is a cell . Using index {1,7:10} is cell expansion, and is going to produce a comma-separated list, just as if you had invoked

 sum(ATretreive{1,7}, ATretreive{1,8}, ATretreive{1,9}, ATretreive{1,10})

That is too many non-option arguments for sum()

I suspect what you want is

 mean(cell2mat(ATretrieve(1,7:10)), 2) * 100 - 273

but you need to figure out whether you want the sum to be by row or by column; the version with mean() here is by row under the guess that the division by 4 corresponds to division by number of columns.

[Alexandra Philip]

I tried it out with mean() and I got this error:

Error using cell2mat
Too many input arguments.

[madhan ravi]

 whos ATretreive