How to put a condition for equations in the computation

Hi

I have attached a data 'al' varies from say 0.05 to 0.32.

I want calculate d from al, but there are two equations for the d based on al values, like

if al>0.15 then, d = 38.18.*(1-3.39.*p+1.95.*al.^2); (eq 1)

if al>0.15 then d = 33.18.*(1-2.39.*p+1.05.*al.^2); (eq 2)

How I can put this condition in my code that if al>0.15 use equation 1 and otherwise eq 2. and a final d = 115*1.

[Nisar Ahmed]

@Carter Sorensen Thanks dear

Answer 1

[Carter Sorensen]

Hi Nisar,

I may be misunderstanding your question, so please let me know if my response is not what you were looking for.

You could use a simple for-loop to cycle through the different values in 'al'. Within the for-loop, an if-else statement could check whether 'al' is > 0.15 and then compute the appropriate 'd'. Below is an example (note, I assumed a 'p' value):

p = 1; % Assumed 'p'

for i = 1:length(al) % Cycles through 'al' values

if al(i) > 0.15 % Checks first condition

d(i) = 38.18.*(1-3.39.*p+1.95.*al(i).^2); % Computes 'd' if first condition met

else

d(i) = 33.18.*(1-2.39.*p+1.05.*al(i).^2);

end

end

The result is stored in a 115x1 matrix called 'd'.