Coding FLAME Algorithms with FLAMElab Example: dot product

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Coding FLAME Algorithms with FLAME_at_labExample
dot product

• Robert van de Geijn
• Department of Computer Sciences, UT-Austin

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What is FLAME_at_lab?

• FLAME_at_lab is the Mscript Application Programming
  Interface (API) for coding FLAME algorithms.
• Mscript is the programming language for Matlab
  and Octave (which is a public domain version of
  Matlab).

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This tutorial assumes that you have already
completed the FLaTeX tutorial
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Upon completion of the FLaTeX tutorial, your
Spark session looked something like this.
Recreate this state if it is not already in this
state.
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Select FLAME_at_lab and click Generate Code
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Select All in the right frame and Copy
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Create a directory Change to that directory
Start up emacs (or your favorite text editor)
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Paste the FLAME_at_lab code skeleton
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Delete the default comments in the loop body
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Notice that the only part of the algorithm for
which Spark doesnt generate code is the update
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Fill in the update and presto! the code is
finished
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Start octave Note the traditional option is
required to make sure that octave doesnt
complain about matrices with one or more
dimension equal to zero
Set the path to where FLAME_at_lab was installed.
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Create random vectors x and y, and set a to 2
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Execute the function Dot_unb_var1 and check
against the answer that octave gives. (Note the
indicates transposition in Mscript.)
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