Recent posts
https://software.intel.com/en-us/recent/983302
enFirst Derivative
https://software.intel.com/en-us/forums/topic/544711
<p>Hi,</p>
<p>I have some data (z,h) which reprents sinusoidal curve. Now, I would like to calculate first derivative dh/dz at each point (z,h).</p>
<p>I am using Intel Fortran Compiler with IMSL.</p>
<p>Can you please help me in this regard?</p>
<p>Cheers</p>
Fri, 27 Mar 15 18:38:57 -0700Nazmul I.544711Pi value in double precision
https://software.intel.com/en-us/forums/topic/490432
<p>I am using Fortran90. I would like to declare 'pi' as a double precision parameter.</p>
<p>How can I express 'pi' value in double precision,and how many decimal points should I consider in this case?</p>
<p>Can anybody help me in this regard?</p>
Tue, 19 Nov 13 17:16:22 -0800Nazmul I.490432Writing data with Format
https://software.intel.com/en-us/forums/topic/490429
<p>I have declared variable as double precision and I would like to write them with format. </p>
<p>Which descriptor should I use to write data, F or D? For example F22.14 or D22.14.</p>
<p>It is mentioned that I am writing Fortran90 language.</p>
<p>Can any body help me in this regard?</p>
Tue, 19 Nov 13 17:11:35 -0800Nazmul I.490429Number of characters in one line in free-format in Fortran90
https://software.intel.com/en-us/forums/topic/489142
<p>Does Fortran90 allow to write more than 132 charactes in a line in free-format? If I write more than 132 characters in a line in free-format Fortran90, what will happen then?</p>
Tue, 12 Nov 13 18:10:12 -0800Nazmul I.489142Determinant and inverse of a matrix
https://software.intel.com/en-us/forums/topic/489136
<p>Hi, I am using Intel Visual Fortran with IMSL. I am solving a system of equation in the form Ax=b by using the IMSL routine LIN_SOL_GEN(A,b,x) and I am using IMSL routine LIN_SOL_GEN(A,b,x,nrhs=0,ainv=inv,det=determinant) to find the determinant and the inverse of the matrix A. When I solve the system with A as 200 by 200 matrix, then the determinant is 1.795566494113669E-202 and obtaining inverse along with the solution with errors. But when I solve the system with A as 400 by 400 matrix, then the determinant is 0.000000000000000E+000 and obtaining inverse along with the solution with errors. I know, when determinant is zero, i am not able to get solution. Can anybody help me to say, what is happening in the case of 400 by 400 matrix with determinant zero? It is noted that, I am using determinant(1)**determinant(2) to calculate the whole determinant.</p>
Tue, 12 Nov 13 15:57:51 -0800Nazmul I.489136Solution of system of equations
https://software.intel.com/en-us/forums/topic/488971
<p>I am using Intel Fortran Composer with IMSL and trying to solve a system of equations with the imsl routine LSARG. I decarded USE LSARG_INT and called by CALL LSARG (A, B, X). But I am seeing the following error: </p>
<p>Error 1 error #6285: There is no matching specific subroutine for this generic subroutine call. [LSARG] D:\Fortran Programming\Project2\Project2\program02_version13.f90 689.</p>
<p>It is noted that I used, include 'link_fnl_shared.h', to link with IMSL.</p>
<p>Can anybody help me in this regard?</p>
</p>
Mon, 11 Nov 13 22:28:05 -0800Nazmul I.488971