@@ -111,13 +111,13 @@ The filename is changed to quadEM_HDF5_ROI_001.h5. The resulting file size is 1
111111The following is an IDL program to process the data in quadEM_HDF5_001.h5.
112112The program does the following:
113113
114- - Reads the dataset /entry/data/data into a variable called `data `.
115- - Displays information about ' data' .
116- - Reformats ' data' from a 3-D array with dimensions [11, 2000, 200] to a 2-D array with dimensions [11, 400000].
117- - Extracts the SumAll data into a variable called ' sum_all' , which the 6'th column of ' data' .
118- - Compute a ' time' array variable which is the time of each sample. It is 400000 points with 50 microseconds per point.
119- - Plots the first 0.5 seconds (1000 points) of ' sum_all' vs ' time' .
120- - Computes the absolute value of the FFT of the ' sum_all' variable, which is the power spectrum.
114+ - Reads the dataset /entry/data/data into a variable called `` data ` `.
115+ - Displays information about `` data `` .
116+ - Reformats `` data `` from a 3-D array with dimensions [11, 2000, 200] to a 2-D array with dimensions [11, 400000].
117+ - Extracts the SumAll data into a variable called `` sum_all `` , which the 6'th column of `` data `` .
118+ - Compute a `` time `` array variable which is the time of each sample. It is 400000 points with 50 microseconds per point.
119+ - Plots the first 0.5 seconds (1000 points) of `` sum_all `` vs `` time `` .
120+ - Computes the absolute value of the FFT of the `` sum_all `` variable, which is the power spectrum.
121121- Sets the first element (0 frequency, i.e. DC offset) to 0.
122122- Computes the frequency acis, which is 200000 points going from 0 to the Nyquist freqency of 10 kHz.
123123- Plots the power spectrum vs frequency. Plots only the first 20000 points, which is 0 to 1 kHz, on a vertical log scale.
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