Anonymous Functions Question using Heat

Energy required to heat water at constant pressure is approximately :

E=m * Cp(delta T)

m=mass
Cp= heat capacity of H2O 1cal/gK
delta T= change in temperature

Create an anonymous function called heat to find energy required to heat 1 gram of H2O if change in temp is provided as the input

g [(cal 1)/(g K)] K = cal

Joules are the units of energy used most often. Create another anonymous function cal_to_J to convert your answer to Joules (4.2 J/ cal)

Save your anonymous function to a .mat file.

This is what I have so far:

    heat=@(g,T) g.*T;
    heat
    heat(1,T)
    cal_to_J=@(ans) ans.*4.2
    cal_to_J
    cal_to_J(ans)

Any help would be appreciated, thank you!!

[Walter Roberson]

What difficulty are you observing?

Note: it is not a good idea to use "ans" as the name of a variable!

[philip colby]

I think it is because you defined your function as t but typed T in your formula

[Walter Roberson]

The poster never used "t". The poster did, though, try to call heat(1,T) in a context where T is not defined