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actuallly for DGESV i just try to run a sample program as what it was explain in netlib but i had that error((i think arguments r carefully checked) , besides at last o need to run a subroutin in lapack,but i have errors too, does my OS take part in this error? what should i do?

i just copy these libraries in where my program is and use LAPACKd.lib&BLASd.lib what do you mean by 3)???

i am going to use lapack library , but i have this error : Console1.obj : error LNK2001: unresolved external symbol _DGESV@32 Console1.exe : fatal error LNK1120: 1 unresolved externals i copy lapack and blas library where my program is,what should i do? how about if i want to evaluate the...

hi iam trying to find eignvalue of a complex&real matrix (2 matrix), but any algorithm(LU ,cholesky) that i used was not work correctlu for any n*n matrix, besides i dont know how to work with LAPACK (how to add library?) does any one have any idea? i must calculate the eigen value...

actuallly there isnt any problem with complex*16 , but i have a matrix elements that defining variables as complex*16 make so many mistakes (because of declaring them them as complex before)i change forexample 2-->2.d0 but errors didnt gone. so i perefer to use a function or any thing else...

is there any thing for converting simple precision 2 dp in middle of program?

actually i use that but the problem is for converting complex 2 complex(dp), bcz in my programm most subroutines work with complex parameters, i use that subroutin but i have the problem that i explained before.

actually my matrix elements r complex 2, thats why any code that i use for calculating its eigenvalue dosent work well,

how can i deternine a complex eignvalue of a matrix with complex elements? and how about a complex double percision eignvalues?

tnx so much

tnx so much for your attention how i can use double precision,and activate the debugging flag?

TNX FOR YOUR ANSWER FIRST OF ALL THIS IS THE EXACT ERROR THAT I HAVE:run-time error M6104:MATH-floating -point error:overflow MOREOVER i replaced dowhile statements to do loops but i get the wrong error! actually i know that its loop r too larg but that must be taken even with more steps.the...

hi i am working a complicate complex matrix elemnet,i must run that for diffrent dimenssion of matrix, find its invers and determinant after that mutiply 2 matrix and at last find the maximum! for each matrix element i have a summation ,and 2 function. implimenting for low dimensions like 2-5...

TNX

TNX FOR REPLY. IC,I STILL HAVE ERRORS! HERE IS MY CODE!http://www.mediafire.com/file/q3zvb8yiec60xso/Text1.f90

tnx for your reply actually i have write and read for the old one 2 so can i use "old"?

i am going to use a file that its data is deleted after some processes ,and another data will be typed while the program is runnnig ,during run time this proccess will occure many times. how i can clear old data before writing the new one? regards