You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: arGetPlotYTrafo.m
    path of file: ./repos/d2d/arFramework3/Subfunctions
    
    the code of the file until where you have to start completion: % [trafos, ylegend] = arGetPlotYTrafo(jm, jd, jplot)
%
% This function fetches the transformation function for an observable prior to plotting.
%     
%   jm        
    
function fetches the transformation function for an observable prior to plotting.
%     
%   jm        Model index
%   jd        Data index
%   jplot     Plot index
%       
% This function returns a list of anonymous functions containing the 
% transformations for the y-axis and the respective legends.
%
% This function uses the information in the fields:
%   ar.model(jm).plot(jplot).ytrafo       - custom trafo
%   ar.model(jm).data(#).logfitting(jy)   - log10 fitting of specific observables
%   ar.model(jm).data(3).logplotting(jy)  - log10 plotting of specific observables
%
%  Note: This function is not intended to be used by the end user.
function [trafos, ylegend] = arGetPlotYTrafo(jm, jd, jplot)
    global ar;

    % Do we have an additional transformation?
    if isfield( ar.model(jm).plot(jplot), 'ytrafo' )
        ytrafo = ar.model(jm).plot(jplot).ytrafo;
        
        % Grab textual transform representation of the function
        c = char(ytrafo);
        ffunc = strrep(strrep( c(strfind(c,')')+1:end