C (cygwin, gcc, vi, gnuplot)

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• C (cygwin, gcc, vi, gnuplot)
• FFT (1D and 2D, convolution, correlation)
• SAR (eSAR Processor)
• InSAR (eInSAR Processor)
• ??? ?? ??? ??

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Cygwin

• Linux-like environment for Windows
• Why cygwin?
• Free
• Windows applications
• Website www.cygwin.com

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Cygwin Setup

• Setup.exe
• Install from the internet
• Install for All Users
• Root directory f\cygwin
• Default text file type Unix/binary RECOMMENDED
• Select FTP site
• Package selection
• Devel -gt gcc (GCC C compiler)
• Editors -gt vim (a text editor)
• Graphics -gt gnuplot
• Shells -gt bash (c shell)
• System -gt procps (top system monitoring)
• Text -gt more (file viewer)
• X11 -gt xorg-x11-base

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Cygwin Setup

• Text Editor WordPad
• Edit .bash_profile
• Set PATH so it includes user's private bin if
  it exists
• if -d "HOME/bin" then
• PATH./HOME/binPATH
• fi
• Edit .bashrc
• alias dir'ls -alF
• Try linux commands
• cd, ls, man, dir, cc, pwd, top, startx

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gnuplot test

• Try gnuplot
• cygwingt startx
• In X-terminal,
• cygwinxgt gnuplot
• gnuplotgt plot sin(x)
• gnuplotgt plot -55 -22 cos(x)
• gnuplotgt splot cos(xy)
• gnuplotgt replot sin(xy)
• gnuplotgt help
• gnuplotgt help plotting

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Gcc Hello World

• Text editor WordPad
• Edit hello.c
• include ltstdio.hgt
• main()
• printf(Hello World!!\n)
• Compile and run
• cygwingtcc o hello hello.c
• cygwingt hello
• Hello World!!

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Gcc gnuplot

• Edit plot1.c
• include ltstdio.hgt
• main()
• FILE fp
• int i
• double pi
• pi4.atan(1.)
• fpfopen(plot1.dat, w)
• for(i0 ilt100 i)
• fprintf(fp, d lf\n, i, sin(2pii/50))
• fclose(fp)
• Compile, run and plot