readFile.m

%Takes .xml file generated by fcal and finds the image to probe transform

%Input: path to .xml file

%Output: Image-To-Probe transform 

function[matrix] = readFile(filePath)

%open .xml file and rewrite it to a .txt file
    reWrite = 'outputXML.txt';
    file = xmlread(filePath, 'rt');
    xmlwrite(reWrite, file);
  
%open newly generated .txt file
    file = fopen(reWrite);
    
%Read in transform from .txt file
    transform = textscan(file, '<Transform Date="%f_%f" Error="%f" From="Image" Matrix="%f%f%f%f%f%f%f%f%f%f%f%f%f%f%f%f', 'headerLines', 49);
    
%generate a 4x4 matrix of the image to probe transform
    matrix = [transform{4}(1),transform{5}(1), transform{6}(1),transform{7}(1);transform{8}(1),transform{9}(1),transform{10}(1),transform{11}(1);transform{12}(1),transform{13}(1),transform{14}(1), transform{15}(1);transform{16}(1), transform{17}(1), transform{18}(1), transform{19}(1)];

    fclose(file);
end