Setting a function equal to some value by changing another value.

I am trying to solve my function "morgpay" = to 600 by changing the down payment value (d). My program is working fine but I cannot get it to save my d value for the y of 600. I'm very new to Matlab so I would assume this something simple but I can't figure it out. Thanks!

for d= 250000:349900
if y == 600 
    d = dg
end
y=morgpay(.2240,15,349900,d);

end

[Rik]

I would recommend doing the Onramp tutorial (which is provided for free by Mathworks). That should teach you how to handle changing values in a loop and how to use functions.

Answer 1

[Matt J]

If morgpay is monotonic in d, it may be more efficient to use fzero(),

fun=@(d)morgpay(.2240,15,349900,d)-600;

dg=fzero(fun,[250000,349900])