On Mon, 13 Mar 2017, Werner Pamler wrote:
Hi everybody - my first post here...
At the moment I am spending some time with fpc's numlib and writing a
wrapper for a more versatile fitting procedure. Are there any problems
to add the unit math to the uses clause of some numlib units? I want to
use the value NaN (not-a-number) which is defined in numlib, but there
is no way to check whether a value is "equal" to NaN. In math, however,
there is a function IsNaN(). And my feeling is that these special
numbers NaN and Infinity are implemented in math in a more general way
than in numlib. An idea would be to remove NaN and Infinity from the
numlib unit "typ" to replace them by the math values.
You can use the routines from the system unit for this.
http://www.freepascal.org/docs-html-3.0.0/rtl/system/textended80rec.html
http://www.freepascal.org/docs-html-3.0.0/rtl/system/tdoublerec.html
http://www.freepascal.org/docs-html-3.0.0/rtl/system/tsinglerec.html
function SpecialType.
Michael.
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