plot errorbar with tilt direction

plot errorbar with tilt direction .
Plot errorbar with customized direction. When you want to illustrate the error which is not on y axis, you can use this code. Even though you still can use it when the error is on y axis just by setting tiltAngle to 0.
% function [h]=errorbar_diag(x,y,se,tiltAngle,linespec)
% errorbar_diag(x,y,se)
% errorbar_diag(x,y,se,tiltAngle)
% errorbar_diag(x,y,se,tiltAngle,linespec)
% h=errorbar_diag(...)
% INPUT
% x,y: vectors of x and y data
% se: vectors of error on diagonal
% tiltAngle: tile angle of errorbar(unit is degree),vertical errorbar is 0. default:45(on diagonal)
% linespec: appearance of line