how to calculate the probability of a t distribution in matlab

To calculate the cumulative probability (i.e. area under the curve) of a t-distribution in MATLAB, you can use the "tcdf" function. The syntax for this function is as follows:

main.m
P = tcdf(X, V)
15 chars
2 lines

where "X" is the t-value, and "V" is the degrees of freedom.

For example, to calculate the probability of a t-value of 1.96 with 10 degrees of freedom, you can use the following code:

main.m
P = tcdf(1.96, 10)
19 chars
2 lines

This will give you the probability that a random variable from a t-distribution with 10 degrees of freedom will be less than or equal to 1.96.

Note that you can also use the "tinv" function to convert a given probability to a t-value. The syntax for this function is:

main.m
X = tinv(P, V)
15 chars
2 lines

where "P" is the probability and "V" is the degrees of freedom.