Complex Number Conversion to character form

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Shafali 2016-11-11

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评论： Walter Roberson 2016-11-14

Notable Behavior of Conversions with Formatting Operators:

Numeric conversions print only the real component of complex numbers.
If you specify a conversion that does not fit the data, such as a character conversion for a numeric value, MATLAB® overrides the specified conversion, and uses %e.

Is there any way by which I can print real part as well as imaginary part of a complex number in string form?

Can I fit a large scale data in character conversion?

I am implementing an algorithm to encrypt text using complex number and after encrypting just want to convert that encrypted data (complex number) into character form. Because of number format limitation, I am unable to convert it. Please help me to solve this problem...

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Adam 2016-11-11

编辑：Adam 2016-11-11

I don't see why this can't be achieved by simply using sprintf, but you haven't given any examples so maybe I am just misunderstanding what you are looking for.

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Answer 1

Guillaume 2016-11-11

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在 MATLAB Online 中打开

What is large scale data?

I don't see the problem in printing / converting complex numbers:

n = pi + 1i*log(2);
s = sprintf('%g + %gi', real(n), imag(n))  %or whichever format you want

And if n is an array:

s = arrayfun(@(x) sprintf('%g + %gi', real(x), imag(x)), n, 'UniformOutput', false)

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Shafali 2016-11-13

This function does not help me to produce the output in required character form.

Shafali 2016-11-13

As I said that I am trying to implement an encryption algorithm so in this I am doing arithmetic operation with the help of 128bit (digits) complex number key. That result I want to show in character form.

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Answer 2

Steven Lord 2016-11-11

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Based on your previous questions, you're going to try to convert a symbolic complex number into a char array. Is that correct? If so use the char function on your symbolic expression, possibly in conjunction with the vpa function.

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Shafali 2016-11-14

again getting output in single quote form like '104.000397...' by applying the above function.

Walter Roberson 2016-11-14

Yes. You are asking to process an array of values, not a single value, and you have not said anything about how you want to code the array markers. For example do you want the items written out using '[' and ']' and ';' between rows and ',' between items? What do you want done if the matrix has more than 2 dimensions?

I would caution you that if you are wanting the quotes removed then chances are that you are trying to create you intend to execute, which would be a mistake because without the quotes the value is going to be converted as a plain double precision number.

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