rebinning procedure

clf
clear

function [magField, magnetisation] = assignData(hysteresisType)
    filename = uigetfile(["*.xls"],"C:\Users\oliverp\Desktop\Scilab Graphing Files\", "Choose " + string(hysteresisType) + " file to be rebinned", %f)
    data = readxls(filename)
    datasheet = data(1)
    magField = datasheet(2:$, 1)
    magnetisation = datasheet(2:$, 2)
endfunction

function [fieldSample1, magSample1, fieldSample2, magSample2, fieldSample3, magSample3] = splitData(xData, yData)
    i = 1
    j = 1
    while( increasingField(xData, i) == %T ) then
        if(xData == 0) then
            fieldSample1(j) == %nan
            magSample1(j) == %nan
        end
        fieldSample1(j) = xData(i)
        magSample1(j) = yData(i)
        i = i + 1
        j = j + 1
    end
    //disp('size of m1Inc = ' + string(j))
    j = 1
    while( increasingField(xData, i) == %F ) then
        if(xData == 0) then
            fieldSample2(j) == %nan
            magSample2(j) == %nan
        end
        fieldSample2(j) = xData(i)
        magSample2(j) = yData(i)
        i = i + 1
        j = j + 1
    end
    //disp('size of m1Dec = ' + string(j))
    j = 1
    while( ( increasingField(xData, i) == %T ) & ( xData(i) ~= xData($) ) ) then
        if(xData == 0) then
            fieldSample3(j) == %nan
            magSample3(j) == %nan
        end

        fieldSample3(j) = xData(i)
        magSample3(j) = yData(i)
        i = i + 1
        j = j + 1
    end
    //disp('size of m2Inc = ' + string(j))
    disp('fields segregated')
endfunction

function fldInc = increasingField(magneticField, i)
    if ( ( magneticField(i) == magneticField($) ) | ( magneticField(i) == magneticField(1) ) ) then
        fldInc = %T
    /*elseif ( (magneticField(i-1) > magneticField(i) ) & ( magneticField(i) == magneticField(i+1) ) ) then
        fldInc = %T
    elseif ( (magneticField(i-1) < magneticField(i) ) & ( magneticField(i) == magneticField(i+1) ) ) then
        fldInc = %F*/
    elseif  ( magneticField(i+1) < magneticField(i)  ) then
        fldInc = %F
    elseif ( magneticField(i+1) > magneticField(i) ) then
        fldInc = %T
    end
endfunction

function d = delta(xSpace, i) //finds spacing in array between the ith and i+1th component
    if( xSpace(i) == xSpace($)) then
        d = abs(xSpace(i - 1) - xSpace(i))
    else
        d = abs(xSpace(i + 1) - xSpace(i))
    end
endfunction

function k = closestDat2Bin( datField, rebinField, j ) // Finds closest datapoint to the rebin point
    n = 1
    diff = []
    minVal = -1
    minCol = -1
    //disp("size of mField = " + string( size(datField, 1) ) )
    for n = 1:size(datField, 1)  do
        diff(n) = abs( datField(n) - rebinField(j) )
    end
    [minVal, minCol] = min(diff)
    k = minCol
    //disp(" k = " + string(k))
endfunction

function i = lhsDat2Bin( datField, rebinField, j, k) //finds left-most datapoint that is still closer to rebin field j than j-1
    if( j == 1) then
        i = k
    elseif (j ~= 1 ) then

        while( abs(magneticField(k-1) - x(j)) < abs(magneticField(k-1) - x(j-1)) )
            k = k - 1
        end
        i = k
        //disp(" i = " + string(i))
    end
endfunction

function yOut = rebinning(magneticField, magnetisation, x)
    //yOut = zeros(size(x,2), 1)
    yMag = zeros( size( x, 1 ), 1 )
    for j = 1:(size(x, 1)-1) do
        //disp('j = ' + string(j))
        n = 0
        i = 0

        k = closestDat2Bin( magneticField, x, j)

        if delta(magneticField, k) <= delta(x, 1) then //if measurement increment is smaller than rebinning increment
            i =  lhsDat2Bin( magneticField, x, j, k)
            while ( abs(magneticField(i) - x(j)) < abs(magneticField(i) - x(j+1)))  //while measurement field is closest to x(j) rebinned data point
                yMag(j) = yMag(j) + magnetisation(i)
                n = n + 1
                //disp(n)
                if( magneticField(i) ~= magneticField($) ) then
                    i = i + 1
                else
                    break
                end
            end
            if n ~= 0 then
                yMag(j) = yMag(j)/n
            else
                yMag(j) = magnetisation(k)
            end
            //disp('yMag = ' + string(yMag(j)) )
        else
            if ( ~isnan(magnetisation(k)) ) then
               yMag(j) = magnetisation(k)
            end
        end
    end
    j = j + 1
    k = closestDat2Bin( magneticField, x, j)
    yMag(j) = magnetisation(k)
    yOut = yMag
endfunction

// Assign arrays from excel files
disp("Pick LCMO hysteresis file:")
[xDataL, yDataL] = assignData("LCMO")

//disp('sheet assigned')
disp("Pick YBCO hysteresis file:")
[xDataY, yDataY] = assignData("YBCO")

disp("Pick YSL-1 hysteresis file:")
[xDataYSL, yDataYSL] = assignData("YSL")

// Create a struct for each array to be rebinned
LCMOhyst = struct('x1', ,'x2', , 'x3', ,'y1', ,'y2', ,'y3',  ,'sample', 'LCMO')
[LCMOhyst.x1, LCMOhyst.y1, LCMOhyst.x2, LCMOhyst.y2, LCMOhyst.x3, LCMOhyst.y3] = splitData(xDataL, yDataL)

YBCOhyst = struct('x1', ,'x2', , 'x3', ,'y1', ,'y2', ,'y3',  ,'sample', 'YBCO')
[YBCOhyst.x1, YBCOhyst.y1, YBCOhyst.x2, YBCOhyst.y2, YBCOhyst.x3, YBCOhyst.y3] = splitData(xDataY, yDataY)

// Rebinning section
x1 = 0.03:0.01:0.99
disp('Rebinning part 1')
y1L = rebinning( LCMOhyst.x1, LCMOhyst.y1, x1' )
y1Y = rebinning( YBCOhyst.x1, YBCOhyst.y1, x1' )
disp('part 1 Completed')

x2 = 1:-0.01:-0.99
disp('Rebinning part 2')
y2L = rebinning( LCMOhyst.x2, LCMOhyst.y2, x2' )
y2Y = rebinning( YBCOhyst.x2, YBCOhyst.y2, x2' )
disp('part 2 Completed')

x3 = -1:0.01:0.1
disp('Rebinning part 3')
y3L = rebinning( LCMOhyst.x3, LCMOhyst.y3, x3' )
y3Y = rebinning( YBCOhyst.x3, YBCOhyst.y3, x3' )
disp('part 3 Completed')

//Concatenate sections of hysteresis into final rebinned data
x = cat(1, x1', x2', x3')
yLCMO = cat(1, y1L, y2L, y3L)
yYBCO = cat(1, y1Y, y2Y, y3Y)

//Normalise the maximum values for manipulation
yYBCO = yYBCO * max(yDataYSL)/max(yYBCO)
yLCMO = yLCMO * max(yDataYSL)/max(yLCMO)

// Plot data
plot(x, yLCMO, 'r')
plot(x, yYBCO, 'b')
plot(x, yYBCO + yLCMO, '-oblk')
plot(xDataYSL, yDataYSL, 'g')