Constraints in TextWaves for ThreadSafe FuncFit

Unfortunately, the code that parses those text waves uses Igor's interpreter, which is not thread safe. That was my solution to recognizing the various symbols that you can use there. The interpreter is ancient code rife with globals, and is unlikely ever to be threadsafe.

My only offering is that you can call CurveFit to generate the required waves using the /C flag. Note that this is a "flag" which means one of the flags right after CurveFit or FuncFit. There is also the /C "parameter" down at the end of the command that specifies the constraint specification.

The format of the waves required is described in DisplayHelpTopic "Constraint Matrix and Vector". It is not entirely opaque, just mostly :)

I have tried it this way and it works well, but it is just complicated. This was the reason of my wish.

Alternatively, would it not be possible to implement the "/C" as a separate function that converts a text wave into the two needed waves (without performing a fit)?

Quick and dirty version:

function f_constr_txt_to_matrix(wave/T w_T_Constraints, variable number_of_Ks)
	string importstring=""
	variable v_num_rows=Dimsize(w_T_Constraints,0)
	variable index
	for (index=0;index<v_num_rows;index+=1)
		importstring+=w_T_Constraints[index]
		importstring+=";"
	endfor
	importstring=replacestring("K",importstring,"")
	variable v_items=itemsinList(importstring)
	make/O/N=(v_items) temporary_wave
	for (index=0;index<v_items;index+=1)
		temporary_wave[index]=str2num(StringFromList(index,importstring))
	endfor
	make/O/N=(v_items,number_of_Ks) M_FitConstraint=0
	make/O/N=(v_items) W_FitConstraint
	string tempstring	
	string s_replace
	variable v_row=0
	variable v_read
	for (index=0;index<v_items;index+=1)
		tempstring=StringFromList(index,importstring)
		if (StringMatch(tempstring,"*>*")==1)
			s_replace=num2str(temporary_wave[index])+" >"
			tempstring=replacestring(s_replace,tempstring,"")
			v_read=str2num(tempstring)
			M_FitConstraint[v_row][temporary_wave[index]]=-1
			if (v_read==0)
				W_FitConstraint[v_row]=v_read
			else
				W_FitConstraint[v_row]=(-1)*v_read
			endif
		else
			s_replace=num2str(temporary_wave[index])+" <"
			tempstring=replacestring(s_replace,tempstring,"")
			v_read=str2num(tempstring)
			M_FitConstraint[v_row][temporary_wave[index]]=1
			W_FitConstraint[v_row]=v_read
		endif
		v_row+=1
	endfor
	killwaves temporary_wave	
end

I have entered your idea in the wish list. Unlikely to make it into Igor 9.

Ok, thank you.