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@XDN wrote:
Hi community
I calculate a matrix of numbers,sometimes in the matrix there are complexes.
how can i find them, because my matrix have lot of line.
Thanks
I guess that with "complexes" you mean non-real number. After all 5 is a real number and as such its a complex number, too 😉
Not sure what exactly you have in mind if you write the you want to "find" those non-real numbers.
Here are a few suggestions - hope it helps:
Remarks:
"match" will fail if no non-real number is included in the vector
"trim" will fail if all vector elements are non-real
A workaround is to create modified "match" and "trim" functions:
Note: In Prime use "else" instead of "otherwise" and "try" instead of "on error"
@XDN wrote:
Hi community
I calculate a matrix of numbers,sometimes in the matrix there are complexes.
how can i find them, because my matrix have lot of line.
Thanks
I guess that with "complexes" you mean non-real number. After all 5 is a real number and as such its a complex number, too 😉
Not sure what exactly you have in mind if you write the you want to "find" those non-real numbers.
Here are a few suggestions - hope it helps:
Remarks:
"match" will fail if no non-real number is included in the vector
"trim" will fail if all vector elements are non-real
A workaround is to create modified "match" and "trim" functions:
Note: In Prime use "else" instead of "otherwise" and "try" instead of "on error"
@XDN wrote:
In P7 where i find "Im"?
I don't uderstand this "IM" it is a MC15 function?
"Im" (lower case "m"!) is a normal function also available in Prime 7 which returns the imaginary part of its argument.
Im(2-3j) -> -3 and Im(123) -> 0
So asking for Im(...) not being zero means asking for a non-real number.
The pendent to "Im" is the "Re" function which returns the real part of its argument.
I assume you are using the full version of Prime 7 and not the limited free Express version and so "Im" should be readily available. Maybe you typed an uppercase "M" instead of a lowercase one? Names (functions, variables, units) are case sensitive!
In case you are using the Express version - "Re" and "Im" are functions which are not available in Prime Express but can easily be defined using the (available) conjugate complex operator:
