Extracting a particular string from a longer one

Question

SourceTemperatureMZ_ES20-ATF786_D03-R_8x8-5hz_NoCG_0klux-black3--5degc__20181105_203705-5MZ_ES20-ATF786_D03-R_8x8-5hz_NoCG_0klux-grey17--30degc__20181105_194659-30MZ_ES20-ATF786_D03-R_8x8-5hz_NoCG_0klux-white64-70degc__20181105_18392070

Hi,

I am trying to extract the temperature from the "Source" column in the JMP table above using JSL

In the Temperature column I have written the results that I would like. My problem is that the delimiter between the colour

(black3,grey17 and white64) and the temperature is a dash "-" but sometimes the temperature is negative which is also "-"

I have tried a number of things with the Word function but so far to no avail. Any help with this would be apprecated.

Thanks and regards,

David

Mark_Bailey · Accepted Answer

This problem is easily solved by the Regex() string function. Try this:

Num( Regex( :Source, "-(-?\d\d?\d?)degc", "\1" ) )

txnelson · Accepted Answer

Here is a formula that I believe will do the trick

degCPosition = Contains( :Source, "degc__" ) - 1;
i = degCPosition;
While( Substr( :Source, i, 1 ) != "-", i-- );
If( Substr( :Source, i - 1, 1 ) == "-",
	result = Num( Substr( :Source, i, (degCPosition - i) + 1 ) ),
	result = Num( Substr( :Source, i + 1, degCPosition - i ) )
);
result;