Maple
Contents
Description
Maple is a general-purpose computer algebra system -- an enviroment for sympolic computations, solving scientific and engeneering problems, mathematic research, and/or data visualization, thus allowing a creation of technical publications.
Usage
The following usage examples are specialized on and tested with the newest Maple version available (Maple 16); their application on the older versions is possible, but might not work.
Once submitting a job, which is intended to perform Maple computations, it is necessary to provide the scheduler with a requirement for available Maple license (thus, the job will be started just once a license becomes available). This requirement is specified by setting the maple job's property, as shown on the following examples (for another license reservation options see the #License reservation section below).
Interactive use
- Provide the scheduling system with a requirement for the number of available nodes/cores and Maple licenses:
qsub -I -l select=1:ncpus=X:... -l maple=1 # requires 1 license, 1 node having X cores
- Initialize the Maple environment ("module add maple") and run the command:
- maple ... for interactive text environment
- xmaple ... for interactive graphical environment
- if the interactive graphical environment is required, it is necessary to have a connection to an X-server, see the page X-Window for details
Batch use
Create a job startup script, which initially performs an intialization of the modules subsystem, followed by an initialization of the Maple environment. After that, the script might perform the Maple computations intended:
#!/bin/sh
# initialize the Maple
module add maple
# perform Maple computations
maple < mymaplefile.{txt,mpl}
Subsequently, submit the script together with your requirements for the number of available nodes/cores and Maple licenses:
qsub -l select=1:ncpus=X:... -l maple=1 myScript.sh # requires 1 license, 1 node having X cores
Integrating Maple with Matlab
The installed Maple Toolbox for Matlab allows two-way integration between Maple and Matlab environments -- the toolbox thus allows to combine the Maple's symbolic computations with Matlab's numeric computations. See more information about the toolbox at Maple official site.
Usage example (interactive job):
- ask the scheduling system for an interactive job
qsub -I -l select=1:ncpus=X:... -l maple=1 # X ... the number of required cores
- initialize the matlab module
module add matlab
- start the Matlab having the Maple symbolic toolbox enabled
matlab-sym-maple
- write the following set of commands into the Matlab worksheet:
maple % starts the Maple (might take some time)
syms x y % initializes symbolic variables
cos(sqrt(x^2-y^2))/x^2
setmaple('h',ans) % allows the result to be accessible from the Maple
- an access to the resulting formula (h variable) from the Maple environment can be checked by typing the h into the Maple worksheet and pressing Enter -- the Matlab formula should be shown.
For more detail (e.g., a batch toolbox usage), please visit the Matlab section of this Wiki or visit the Maple official pages.
A very useful videopresentation illustrating the toolbox usage together with its capabilities can be found here.
Documentation
- The documentation is available at the Maple official site or locally in the Maple directory.
Licenses
- Maple 2017.1: 15 floating liceses
- Maple 16: 30 floating liceses
- Maple 15: 30 floating liceses
Program administrator
Homepage
URL: http://www.maplesoft.com/products/maple/index.aspx
License reservations
As mentioned above, the Maple application is available in different versions:
- when using a floating license (Maple 15 and 16), it is necessary to ask the scheduling system for a license reservation via the job submission attributes. Currently, there are for types of Maple licenses available via the scheduling system attributes:
- maple Maple 16, 15
Maple 16
The Maple 16 is able to use just more computational threads (i.e., cores on a single node).
It is necessary to ask for a floating license. Thus, the job submission (requiring a single computational node) should be performed as follows:
qsub -l select=1:ncpus=4:mem=16gb -l maple=1 ...
i.e., the job is asking for four cores on a single 64-bit node, 16GB of memory and a single Maple 16 license.
Maple 15
The Maple 15 is able to use both more computational threads (i.e., cores on a single node) and more distributed nodes (once the Grid toolbox becomes availabe -- see above).
It is necessary to ask for a floating license. Thus, the job submission (requiring a single computational node) should be performed as follows:
qsub -l select=1:ncpus=4:mem=16gb -l maple=1 ...
i.e., the job is asking for four cores on a single 64-bit node, 16GB of memory and a single Maple 15 license.