meaning of f in fprintf function

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Spaceman 2024-3-20

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评论： Spaceman 2024-3-21

采纳的回答： Chunru

So this is just a general question, as I familiarize myself with the fprintf and all other glorious functions...

When I use the /f or form feed as it's called, what's that actually doing? What does 'form feed' mean?

Also does anyone know why it's 'fprintf' and not just 'print'?

Thanks in advance!

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Chunru 2024-3-20

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In old days, the command \f is used to make a printer to move to beginning of next pages.

fprintf or print or printf are used by different programming languages for the similar (but may be different) purpose. The begining "f" means file print. The ending "f" means the formatted print.

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Stephen23 2024-3-20

在 MATLAB Online 中打开

"I see it's normally used as well as /i for 'integer' when I am dealing with it, but I don't know the discernable differences."

No, you are mixing things up:

%i is the formatting operator for converting an integer to text.
\f is the representation of the special character named "Form Feed".

Two completely different things.

"Why would I ever need to use /f instead of say, /i?"

The forward-slash has no special meaning, it is interpreted literally. So the actual answer to your question is "whenever you want a literal forward-slash and f or i":

fprintf('/f /i', pi, int8(3))
/f /i

You are confusing several different features of the format specifier, so I will presume that you intended to ask about the formatting operators %f and %i. They are commonly used to convert floating point and integer values respectively:

fprintf('%f %i', pi, int8(3))
3.141593 3

Note how the values are formatted when they are swapped around (the integer is internally coerced into a floating point value, whereas PI() forces FPRINTF to use the default %e):

fprintf('%f %i', int8(3), pi)
3.000000 3.141593e+00

Stephen23 2024-3-20

编辑：Stephen23 2024-3-20

"I wonder why pi is a special case here"

PI is not a special case here.

PI is just a convenient binary floating point value that I used to demonstrate the effect of different formatting operators with. Forget about PI, you can pick any other binary floating point values with fractional part.

Spaceman 2024-3-21