MATLAB: Looping through files and creating and saving plots

plot

Hi,
I'm trying to loop through a folder of files (20) to create 20 plots.
I have most of the code completed I think, but I am unsure of how to
1. title the plot with the name of the file from which the data came from and 2. How to save the plot as a .tif image with the name of the file
Would anybody be able to advise me on this?
Thank you
files = cellstr(ls('*.xls'));
for k = 1:length(files)
sch_cycle = xlsread(files{k}, 'Sheet1');
Y1 = sch_cycle(:,1);
createfigure(Y1);
[~,fn] = fileparts(files{k});
saveas(gca,'fn.tif')                   %%%-Question 2%%%
end
function createfigure(Y1)
%CREATEFIGURE3(Y1)
%  Y1:  vector of y data
%  Auto-generated by MATLAB on 16-Jan-2013 15:53:12
% Create figure
figure1 = figure;
% Create axes
axes1 = axes('Parent',figure1,...
    'XTick',[0 200 400 600 800 1000 1200 1400 1600 1800],...
    'FontWeight','bold',...
    'FontSize',14);
box(axes1,'on');
hold(axes1,'all');
% Create plot
plot(Y1,'LineWidth',1);
% Create xlabel
xlabel('Time (s)','FontWeight','bold','FontSize',14);
% Create ylabel
ylabel('Velocity (km/hr)','FontWeight','bold','FontSize',14);
% Create title
title('fn','FontWeight','bold',...                      %%%-Question 1%%%
    'FontSize',14);
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