Please Make A Note

Please Make a Note is a collection of science & technology tips and derivations that will make it easier for research scientists & engineers to perform the various tasks they are faced with. These notes cover a wide range of scientific topics, software, media, and data analysis utilities.

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Showing posts with label Programming. Show all posts

Showing posts with label Programming. Show all posts

Monday, September 17, 2012

XCode 4 Build Locations (Lion, Mountain Lion)

Apparently, the "most advanced" operating system in the world is not very friendly for power-users and developers. The new xcod...

Friday, September 14, 2012

Calling gnuplot from C/C++ on Mac OS X

Here's another way of calling gnuplot from Mac OS X. First install gnuplot either from their website or using macports. I like the ma...

Wednesday, August 18, 2010

How to Enable PHP Inside HTML Pages

php code can be embedded within html pages within the tags: <?php echo "my php code"; ?> However, and depending on the ser...

Friday, July 23, 2010

Numeric Limits in C++

You can use the "limits" class template to obtain machine specific numeric limits. Here's a sample code: #include <iostrea...

Tuesday, July 20, 2010

2D Arrays in C++ using New

In a previous post I discussed how to create 2D arrays in C. Here's the version for C++. Pointers can be easily used to create a 2D arr...

Thursday, July 15, 2010

Parallel Heat Equation

I apologize for this delay. I've attached the parallel heat equation solver to this post. You can download the code from here http://...

Thursday, May 14, 2009

Calling Gnuplot from c Using Pipes... Again!

Here's another way of calling gnuplot. I like this method because it provides a standalone function that plots your results. Here's ...

How to Call Gnuplot from c Using Pipes (Windows)

Try this: // Open a pipe to gnuplot FILE *gnuplotPipe = popen("c:\\gnuplot\\bin\\pgnuplot -persist","w"); // If gnuplot ...

Saturday, March 7, 2009

An Easy to Use Free IDE for C/C++

I know that you’ve always wondered about what C/C++ compiler and IDE to use under windows. While Microsoft offers its version of the C/C++ c...

Thursday, July 17, 2008

Parallel Computing with MPI - Roundup

Here's a roundup of the topics discussed on parallel computing with MPI. This was illustrated using the 2D heat equation, MPICH2, and Mi...

Parallel Computing with MPI - Part IX: MPI Warmup

[PLEASE NOTE, THAT DUE TO TIME RESTRICTIONS, I WILL NOT BE ABLE TO PUBLISH THE FULL MPI WARMUP TUTORIAL IMMEDIATELY, THEREFORE, I WILL PUT T...

Friday, July 4, 2008

Parallel Computing with MPI - Part VIII: Essential Ingredients of Message Passing

In this article, I will show you, in the most simple of terms, how easy it is to write parallel code using the message passing interface. Th...

Wednesday, July 2, 2008

Parallel Computing with MPI - Part VII: Measuring Parallel Performance

The most obvious benefit of using parallel computing is the reduction in execution time of your code. For example, if your code takes two ho...

Saturday, June 28, 2008

Parallel Computing with MPI - Part VI: Parallel Computing in a Nutshell

Finally, we reach the most interesting part of this series. In this post, I will present, in a nutshell, the parts that you need to know in ...

Wednesday, June 25, 2008

Parallel Computing with MPI - Part V: MPICH2 and Visual Studio

Now that we have covered the sequential code for the finite difference solution of the 2D heat equation, It is time to start thinking in par...

Sunday, June 22, 2008

Parallel Computing with MPI - Part IV: Programming the 2D Heat Equation in C using Visual Studio

Download c code | Download Visual Studio solution In this post, you'll find the code that I have written for the numerical solut...

Wednesday, June 18, 2008

Parallel Computing with MPI - Part III: Stability Analysis of the Discretized Heat Equation

In today's part of this series, we'll go over a basic stability analysis for the discretized heat equation that was derived in the p...

Monday, June 16, 2008

Parallel Computing with MPI - Part II: Discretization of the Heat Equation

In this article, we'll discuss how to discretize the heat equation using an Euler explicit differencing schem. The discretization is fir...

Sunday, June 15, 2008

Parallel Computing with MPI - Part I: The Heat Equation

In this series, I will introduce parallel programming concepts with MPI . This series is prompted by the "Numerical Methods for PDEs ...

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