Systems of Ordinary Differential Equations 01 (DefaultMapleSode branch)
Sode.rb generates a Ruby program to use long Taylor series to solve systems of ordinary differential equations. It generates code to solve the equations in Ruby. Using the Taylor series, estimates are made of the location and order of poles. An effort is made to adjust H to control the error. It has worked well in testing, but needs more testing as there are so many possibilities. License: GNU General Public License v2 Changes:
This is a version to generate Maple code. It is much faster, but has no error estimation. A problem with multiple equations has been fixed.
I want to try solving system of linear algebraic equations in Shell bash but i have any problems Value input is matrix and I dont know how to input matrix in Shell because that is dont support 2-dimensional array Please help me. Thank you so much (3 Replies)
I'm using a script (automysqlbackup) to dump mysql db's to .sql file followed by taking one full backup of the .sql file and the differential backups of the newer sql file every day using the tool diff.
Now the backup destination folder contains files like,
I would like to how do i restore... (3 Replies)
Hello all, this might be better suited for a bioinformatics forum, but I thought I'd try my luck here as well.
I have several tabular text files of DNA sequence reads that appear as such:
File_1.txt
>H01BA45XW GATTACAGATTCGACATCCAACTGAGGCATT
>H02BG78WR CCTTACAGACTGGGCATGAATATTGCATACC... (3 Replies)
I really know barely anything about awk and the like but I have a bit of code I need help with.
The bash script is meant to get my usage numbers from my ISP and it does so perfectly. However I want to know how much I can use each day. So to do this I would need to divide its output by the number... (5 Replies)
Hi,
Just wanted to know is there any way that we can take differential or incremental backups in Unix(Solaris/AIX/Linux or Hpunix).What is the procedure. Is any doc avaialble on this?
Its urgent and any help/suggestions would be highly appreciable.
Regards,
Ravi Dwivedi (3 Replies)
I`m having a cluster with Rocks 5.2 distribution and I want to solve differential equations and I`m interested to know if are some programs already developed to do this. (3 Replies)
I am backing up some data to an NTFS formatted backup drive. I have to preserve the Unix permissions of the data being backed up and therfore use backup into a tar file.
I would like to backup the differnential data in the tar file similiar to how Rsync works so as to save on backup time as it... (1 Reply)
Hello one and all,
I have a basic background in UNIX, but I was wondering if there is a way to perform simple mathematical equations (like multiplication, addition)? If so, is there a way to multiply values from a column by a value to produce a column with the answers? :confused:
I am... (4 Replies)
What are the different ways to identify a given file is an ordinary file or a directory?
Yes we can do it by giving the command :
ls -l <filename>
What else? (4 Replies)
DDTTRSV(l) LAPACK routine (version 2.0) DDTTRSV(l)
NAME
DDTTRSV - solve one of the systems of equations L * X = B, L**T * X = B, or L**H * X = B,
SYNOPSIS
SUBROUTINE DDTTRSV( UPLO, TRANS, N, NRHS, DL, D, DU, B, LDB, INFO )
CHARACTER UPLO, TRANS
INTEGER INFO, LDB, N, NRHS
DOUBLE PRECISION B( LDB, * ), D( * ), DL( * ), DU( * )
PURPOSE
DDTTRSV solves one of the systems of equations
L * X = B, L**T * X = B, or L**H * X = B,
U * X = B, U**T * X = B, or U**H * X = B,
with factors of the tridiagonal matrix A from the LU factorization computed by DDTTRF.
ARGUMENTS
UPLO (input) CHARACTER*1
Specifies whether to solve with L or U.
TRANS (input) CHARACTER
Specifies the form of the system of equations:
= 'N': A * X = B (No transpose)
= 'T': A**T * X = B (Transpose)
= 'C': A**H * X = B (Conjugate transpose)
N (input) INTEGER
The order of the matrix A. N >= 0.
NRHS (input) INTEGER
The number of right hand sides, i.e., the number of columns of the matrix B. NRHS >= 0.
DL (input) COMPLEX array, dimension (N-1)
The (n-1) multipliers that define the matrix L from the LU factorization of A.
D (input) COMPLEX array, dimension (N)
The n diagonal elements of the upper triangular matrix U from the LU factorization of A.
DU (input) COMPLEX array, dimension (N-1)
The (n-1) elements of the first superdiagonal of U.
B (input/output) COMPLEX array, dimension (LDB,NRHS)
On entry, the right hand side matrix B. On exit, B is overwritten by the solution matrix X.
LDB (input) INTEGER
The leading dimension of the array B. LDB >= max(1,N).
INFO (output) INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
modified LAPACK routine 12 May 1997 DDTTRSV(l)