Can anyone help me loop these lengthy codes?

[Yao Zhao]

matrix table1=J(6,6,.)

ttest preaddition == postaddition
matrix table1[1,1] = r(mu_1)
matrix table1[1,2] = r(sd_1)/sqrt(r(N_1))
matrix table1[1,3] = r(mu_2)
matrix table1[1,4] = r(sd_2)/sqrt(r(N_2))
matrix table1[1,5] = r(t)

ttest predeletion == postdeletion
matrix table1[2,1] = r(mu_1)
matrix table1[2,2] = r(sd_1)/sqrt(r(N_1))
matrix table1[2,3] = r(mu_2)
matrix table1[2,4] = r(sd_2)/sqrt(r(N_2))
matrix table1[2,5] = r(t)

ttest pretotal == posttotal
matrix table1[3,1] = r(mu_1)
matrix table1[3,2] = r(sd_1)/sqrt(r(N_1))
matrix table1[3,3] = r(mu_2)
matrix table1[3,4] = r(sd_2)/sqrt(r(N_2))
matrix table1[3,5] = r(t)


matrix list table1

[William Lisowski]

Perhaps this (untested) example will point the way to a solution.

matrix table1=J(6,6,.)

local i = 0
foreach c in addition deletion total {
    local i = `i'+1
    ttest pre`c' == post`c'
    matrix table1[`i',1] = r(mu_1)
    matrix table1[`i',2] = r(sd_1)/sqrt(r(N_1))
    matrix table1[`i',3] = r(mu_2)
    matrix table1[`i',4] = r(sd_2)/sqrt(r(N_2))
    matrix table1[`i',5] = r(t)
}

matrix list table1

[Yao Zhao]

that's correct! I really appreciate you!