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Plugin change

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PostPosted: Tue May 22, 2012 8:00 pm    Post subject: Plugin change Reply with quote

The Baseline Shift plugin has been changed to double-precision (8-bytes) from single-precision (4-bytes). This should have been done long ago, but is a product of that plugin being one of the earliest from the days of DPlot using single-precision data to conserve memory. For the most part this worked fine, but one user presented a case where it clearly wasn't: his time scale was in the neighborhood of 1300 seconds with a time step of 24 microseconds. Just the act of converting to 4 bytes before calling the plugin and then back to 8 bytes after return (though the plugin did not modify times in any way) was enough to lose much of the precision. The modified plugin will be included in the next release. If this is a problem for you now you can get it from http://www.dplot.com/plugins/generate/bshift.dll

Save this file to <dplot folder>\plugins\generate. If you used the default destination folder of the setup program that is c:\Program Files\DPlot\plugins\generate, or c:\Program Files (x86)\DPlot\plugins\generate on 64-bit Windows 7.

All plugins distributed with DPlot have been converted to double-precision. The only other plugin affected by this is the Hi-Techniques Win600 file import plugin, but since the original data in those files is 4-byte integers scaled to floating point values this change shouldn't make an appreciable difference there, either, unless the time scale is as described above (which is unlikely).
David Hyde
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