take the length of each row

Hi

I have this file whih has values and 30 rows. I need to take the average of the length of each row for the attached file. How to do that? I tried but it gives the average among value and I need the length.

Answer 1

[Walter Roberson]

This code assumes that each line ends with a comma and that the number of "values" is equal to the number of commas. It assumes that there are no missing values on a row, and that no row ends in a numeric value.

S = readlines('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1269270/val.txt');
numvals = cellfun(@length, regexp(S, ','))

numvals = 34×1

0 50 37 43 45 71 86 84 79 84

mean(numvals)

ans = 69.8824

[Walter Roberson]

Note: the difference in average between my results and The Cyclist, is because your file starts with a blank line, which is thus a line that contains zero values, and the zero is getting counted in the average.

Answer 2

[the cyclist]

There are probably a few ways to do this. Here is one, which relies on reading the file into a numeric array, which will pad the rows with NaN values.

val = readmatrix("https://www.mathworks.com/matlabcentral/answers/uploaded_files/1269270/val.txt");
mean(~isnan(val),2)

ans = 30×1

0.5556 0.4111 0.4778 0.5000 0.7889 0.9556 0.9333 0.8778 0.9333 0.9667

[Brave A]

I need how many values in each row then the average not the number of rows. I know they are 30 rows.

[the cyclist]

Sorry, I misread. I think this slight change to the above code does what you want.

val = readmatrix("https://www.mathworks.com/matlabcentral/answers/uploaded_files/1269270/val.txt");
rowCount = sum(~isnan(val),2)

rowCount = 30×1

50 37 43 45 71 86 84 79 84 87

meanRowCount = mean(rowCount)

meanRowCount = 79.2000