How to compute the speed from the following dat file

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JD_PM 2022-5-19

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https://ww2.mathworks.cn/matlabcentral/answers/1722765-how-to-compute-the-speed-from-the-following-dat-file

评论： JD_PM 2022-5-19

I want to compute the magnitude of the velocity;data file: surfaceFieldValue1eNEG06.dat https://drive.google.com/drive/folders/1CgeDuCahVZvLXXkNkGWlPg8lSGyurmI3

I run the following code

A = readtable("surfaceFieldValue1eNEG06.dat");
Ux_8 = A{:,"areaAverage_rho_"};
Uy_8 = A{:,"areaAverage_U_"};
Uz_8 = A{:,"areaAverage_p_"};
U_8 = sqrt(Ux_8.^2 + Uy_8.^2 + Uz_8.^2)

However, this yields the following error

Operator '.^' is not supported for operands of type 'cell'.
Error in speedPressure8Inlet (line 12)
U_8 = sqrt(Ux_8.^2 + Uy_8.^2 + Uz_8.^2)

I tried to use readmatrix instead of readtable but then x and z velocity components yield NaN type.

I think the main issue is that for Ux, Uz I have {''} characters. If they were not to be there there would not be a problem.

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JD_PM 2022-5-19

Resolved: remove the braces from the original text file using, say, notepad (ctrl h and replace '(' by space) . So it was not a problem of Matlab actually.

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