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how to convert Fotran format statment in matlab?

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m m
m m on 16 Feb 2020
Commented: James Tursa on 17 Feb 2020
i want to convert this Fortan statment in matlab?
FORMAT(1001E15.6)

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m m
m m on 16 Feb 2020
Fortran formats are used to control the appearance of the input and output.
Sindar
Sindar on 16 Feb 2020
Yes, but what does that command do, specifically? I don't know fortran, but I can probably answer the Matlab question from a description
m m
m m on 16 Feb 2020
i don't know im not good in fortran

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Accepted Answer

Walter Roberson
Walter Roberson on 16 Feb 2020
Is the format being used to read data, or to write data?
If it is being used to write data, then the equivalent would be
fmt = repmat('%15.6e', 1, 1001);
It has been a while since I last did any fortran, so I do not recall at the moment if it automatically added newline; you might need to use
fmt = [repmat('%15.6e', 1, 1001), '\n'];
If, on the other hand, it is being used to read data, then there is no direct equivalent. Using '%15.6e' as an input format for fscanf() or sscanf() or textscan() will seldom do what you expect. The easiest way for reading is to use https://www.mathworks.com/help/matlab/ref/matlab.io.text.fixedwidthimportoptions.html

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James Tursa
James Tursa on 17 Feb 2020
"... if it automatically added newline ..."
Yes. On a sequential write to a text file Fortran will add the newline.
Also, note that in Fortran the format 15.6e on input typically just has the effect that a floating point number will be read in 15 characters. The actual format of the number in those 15 characters will override the 15.6e specific format of the read statement. I.e., the actual number in those 15 characters doesn't have to have exactly 6 decimal values listed after the decimal point, and it doesn't have to have an exponent listed. Pretty much any valid floating point syntax that fits in 15 characters on input will work.

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