Analysis of multiple files

I am trying to parse data that extends between several files on several groups of PDM and channels.

The files are contiguous blocks of the same sampled signals (i.e. they are split only to allow the viewing and effective storage).

I need to analyze each of the signals individually and therefore plan concatenate the data of each channel for all the files and then run an analysis of waveform "en masse."

I generate 288 cases per day, each with about 200 channels. Each daily analysis will therefore contain approximately 8.6 million samples.

However, due to restrictions of memory, I need concatenate each channel individually, rather than using a single continuous file.

I use multiple readings to the same files to extract the information from each channel.

What is the best way to read same files multiple times?

Is it better to open all the files in an array of references PDM and then do a reading for each channel, only the closing of records at the end of the analysis?

Or he would be better open/read/close each file for each channel?

Sorry if this is obvious or answered before!

So getting back to your question, my advice would still be just open/read/close files once. I also recommend to check if it is possible for you to change the data type (for example from double to single data type or even raw). It would be much smaller file size, and therefore increase the read performance.

Cheggers

Tags: NI Software

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