function value=linear(x, knownys, knownxs)% This will compute an output value that is% on a line determined by 4 input values,% known x's, known y's.  The independant% value is give.%% value = line(x, knownys, knownxs)% knownys = [Y1 Y2]% knownxs = [X1 X2]Y1 = knownys(1,1);Y2 = knownys(1,2);X1 = knownxs(1,1);X2 = knownxs(1,2);value = (Y1 - Y2)/(X1 - X2)*x + (Y2 - (Y1 - Y2)/(X1 - X2)*X2);