Custom output of the fprintf

Is there any way to use fprint with an exponential output field (e) for example:

%15.2e

and not get an output such as 3.00e-05 but 30.00e-06? Thank you

[José-Luis]

No, you'd have to write a custom function.

Answer 1

[José-Luis]

Here is a small script to do what you asked for:

val = -0.0000001245332; %for example

tempVal = abs(val);

orderOfMag = floor(log10(tempVal));
if val == 0
    orderOfMag = 1;
end

offset = 1 - orderOfMag; %Here you can change the number of digits to the left of the point. for three replace one by two, e.g.
valueToPrint = val.*10.^offset;

precision = 6; %number of display digits
expPrecision = 3; %number of digits in the exponent
if orderOfMag > 0
    formatStr = ['%0' num2str(expPrecision) 'i'];
else
    formatStr = ['-%0' num2str(expPrecision) 'i'];
end

your_string = [num2str(valueToPrint,precision)...
    'e' ...
     sprintf(formatStr,abs(orderOfMag-1))];

[Giorgos Papakonstantinou]

Thank you for providing me with this script Jose. It is very helpful!

[José-Luis]

My pleasure.

Answer 2

[Image Analyst]

That does not seem to be one of the format specifier options built in. See formatSpec section of the fprintf() help documentation. It would be nice if it were though. I've seen other programs where you can specify "Scientific notation" where the exponent can be any number, and "Engineering Notation" where the exponent is a multiple of 3.

[Giorgos Papakonstantinou]

Thank you. I was searching in the documentation for a long time and I thought I wasn't searching quite enough!

[Image Analyst]

You can send a request for enhancement to [e-mail].