source: sans/Dev/trunk/NCNR_User_Procedures/USANS/BT5_Loader.ipf @ 393

#pragma rtGlobals=1             // Use modern global access method.
#pragma Version=2.20
#pragma IgorVersion=6.0

/////////////////////////
// 101001 Vers. 1
//
// functions to load and parse the ASCII ICP files generated at BT5 USANS
// Nearly all of the important information about the data is dragged around
// with the DetCts wave as a wave note
//
// - thes wave note is a string of KEY:value items
//
//      str = "FILE:"+filen+";"
//      str += "TIMEPT:"+num2str(counttime)+";"
//      str += "PEAKANG:;"              //no value yet
//      str += "STATUS:;"               //no value yet
//      str += "LABEL:"+fileLabel+";"
//      str += "PEAKVAL:;"              //no value yet
//      str += "TWIDE:0;"               //no value yet
//
/////////////////////////


//given the filename, loads a single data file into a "TYPE" folder, into a
//series of 1D waves. counting time is associated with the DetCts wave as a note
//"blank" note entries are set up here as well, so later they can be polled/updated
Function LoadBT5File(fname,type)
        String fname,type
        
        Variable num=200,err=0,refnum
        Make/O/D/N=(num) $("root:"+type+":Angle")
        Make/O/D/N=(num) $("root:"+type+":DetCts")
        Make/O/D/N=(num) $("root:"+type+":ErrDetCts")
        Make/O/D/N=(num) $("root:"+type+":MonCts")
        Make/O/D/N=(num) $("root:"+type+":TransCts")
        Wave Angle = $("root:"+type+":Angle")
        Wave DetCts = $("root:"+type+":DetCts")
        Wave ErrDetCts = $("root:"+type+":ErrDetCts")
        Wave MonCts = $("root:"+type+":MonCts")
        Wave TransCts = $("root:"+type+":TransCts")
        
        Open/R refNum as fname          //if fname is "", a dialog will be presented
        if(refnum==0)
                return(1)               //user cancelled
        endif
        //read in the ASCII data line-by-line
        Variable numLinesLoaded = 0,firstchar,countTime
        Variable v1,v2,v3,v4,v5,v6,v7,v8,v9,v10,v11,v12,v13,v14,v15,v16,ii,valuesRead
        String buffer ="",s1,s2,s3,s4,s5,s6,s7,s8,s9,s10
        String filen="",fileLabel=""
        
        //parse the first line
        FReadLine refnum,buffer
        sscanf buffer, "%s%s%s%s%s%s%g%g%s%g%s",s1,s2,s3,s4,s5,s6,v1,v2,s7,v3,s8
        ii=strlen(s1)
        filen=s1[1,(ii-2)]                      //remove the ' from beginning and end
        //Print "filen = ",filen,strlen(filen)
        //v2 is the monitor prefactor. multiply monitor time by prefactor. AJJ 5 March 07
        countTime=v1*v2
        //Print "time (sec) = ",countTime
        
        //skip line 2
        FReadLine refnum,buffer
        //the next line is the sample label, use it all, minus the terminator
        FReadLine refnum,filelabel
        
        //skip the next 10 lines
        For(ii=0;ii<10;ii+=1)
                FReadLine refnum,buffer
        EndFor
        
        //read the data until EOF - assuming always a pair or lines
        do
                FReadLine refNum, buffer
                if (strlen(buffer) == 0)
                        break                                                   // End of file
                endif
                firstChar = char2num(buffer[0])
                if ( (firstChar==10) || (firstChar==13) )
                        break                                                   // Hit blank line. End of data in the file.
                endif
                sscanf buffer,"%g%g%g",v1,v2,v3         //v2,v3 not used
                angle[numlinesloaded] = v1              //[0] is the ANGLE
                
                FReadLine refNum,buffer //assume a 2nd line is there, w/16 values
                sscanf buffer,"%g,%g,%g,%g,%g,%g,%g,%g,%g,%g,%g,%g,%g,%g,%g,%g",v1,v2,v3,v4,v5,v6,v7,v8,v9,v10,v11,v12,v13,v14,v15,v16
                //valuesRead = V_flag
                //print valuesRead
                MonCts[numlinesloaded] = v1             //monitor
                DetCts[numlinesloaded] = v2 + v3 + v5 + v6 + v7         //5 detectors
                TransCts[numlinesloaded] = v4           //trans detector
                ErrDetCts[numlinesloaded] = sqrt(detCts[numlinesloaded])
                //values 8-16 are always zero
                numlinesloaded += 1             //2 lines in file read, one "real" line of data
        while(1)
                
        Close refNum            // Close the file.
        //Print "numlines = ",numlinesloaded
        //trim the waves to the correct number of points
        Redimension/N=(numlinesloaded) Angle,MonCts,DetCts,TransCts,ErrDetCts
        
        //remove LF from end of filelabel
        filelabel=fileLabel[0,(strlen(fileLabel)-2)]
        
        //set the wave note for the DetCts
        String str=""
        str = "FILE:"+filen+";"
        str += "TIMEPT:"+num2str(counttime)+";"
        str += "PEAKANG:;"              //no value yet
        str += "STATUS:;"               //no value yet
        str += "LABEL:"+fileLabel+";"
        str += "PEAKVAL:;"              //no value yet
        str += "TWIDE:0;"               //no value yet
        Note DetCts,str
        
        String/G fileLbl = filelabel
        return err                      // Zero signifies no error.     
End


//will search for peak in root:type:DetCts,  find and returns the angle
// of the peak poistion (= q=0)
//returns -9999 if error, appends value to wavenote
// !can't return -1,0,1, since these may be the peak angle!
//
Function FindZeroAngle(type)
        String type
        
        Variable pkNotFound,pkPt,pkAngle,pkVal,temp
        Wave angle = $("root:"+type+":Angle")
        Wave detCts = $("root:"+type+":DetCts")

        WaveStats/Q detcts
        temp=V_Maxloc           //in points
        FindPeak/P/Q/M=10/R=[(temp-10),(temp+10)] DetCts                //+/- 10 pts from maximum
        
        //FindPeak/P/Q/M=(1000) detCts          // /M=min ht -- peak must be at least 100x higher than 1st pt
        pkNotFound=V_Flag               //V_Flag==1 if no pk found
        pkPt = V_PeakLoc
        pkVal = V_PeakVal               //for calc of T_rock
        if(pkNotFound)
                //DoAlert 0, "Peak not found"
                Return (-9999)          //fatal error
        Endif
        pkAngle = Angle[pkPt]
        //Print "Peak Angle = ",pkAngle
        //update the note
        String str=""
        str=note(DetCts)
        str = ReplaceNumberByKey("PEAKANG",str,pkangle,":",";")
        str = ReplaceNumberByKey("PEAKVAL",str,pkVal,":",";")
        Note/K DetCts
        Note detCts,str
        
        return(pkAngle)
End

// given the peakAngle (q=0) and the "type" folder of scattering angle, 
// convert the angle to Q-values [degrees to (1/A)]
// makes a new Qvals wave, duplicating the Angle wave, which is assumed to exist
// Uses a conversion constant supplied by John Barker, and is hard-wired in
//
Function ConvertAngle2Qvals(type,pkAngle)
        String type
        Variable pkAngle
        
        Wave angle = $("root:"+type+":Angle")
        Variable num=numpnts(angle)
        Variable deg2QConv=5.55e-5              //JGB -- 2/24/01
        
        Make/O/N=(num) $("root:"+type+":Qvals")
        Wave qvals = $("root:"+type+":Qvals")   
        Qvals = deg2QConv*(angle[p] - pkAngle)
        
        return(0)       //no error
End

//updates the wavenote with the average Trans det cts for calculation of T_Wide
//  finds the average number of counts on the transmission detector at angles
// greater than 2 deg. (per John, practical experience where the trans data levels off)
//
// error value of 1 is returned and wavenote not updated if level is not found
// 
//
Function FindTWideCts(type)
        String type
        
        Variable levNotFound,levPt,Cts,num,ii
        Wave angle = $("root:"+type+":Angle")
        Wave detCts = $("root:"+type+":DetCts")
        Wave TransCts = $("root:"+type+":TransCts")
        FindLevel/Q/P angle,2           //use angles greater than 2 deg
        levNotFound=V_Flag              //V_Flag==1 if no pk found
        if(levNotFound)
                return(1)
        endif
        levPt = trunc(V_LevelX)         // in points, force to integer
        
        //average the trans cts from levPt to the end of the dataset
        num=numpnts(TransCts)
        Cts=0
        for(ii=levPt;ii<num;ii+=1)
                Cts += transCts[ii]
        endfor
        Cts /= (num-levPt-1)
        
        //update the note
        Wave DetCts = $("root:"+type+":DetCts")
        String str,strVal
        str=note(DetCts)
        str = ReplaceNumberByKey("TWIDE",str,Cts,":",";")
        Note/K DetCts
        Note detCts,str
        
        return(0)
End