paired ttest multiple groups loop?

Basic matlab user so assume there is an easy fix for my query, nonetheless looking for assistance on automating paired ttest between as many groups as available. Completing ttest, grouping p value results with group identifiers for sigstar boxplot. How can I loop this so it completes it no matter how many groups and not requiring me to enter them manually? (the groups and group identifiers) Thankyou for any assistance

[zh1,zp1]=ttest(z1,z2);
[zh2,zp2]=ttest(z1,z3);
[zh3,zp3]=ttest(z1,z4);
[zh4,zp4]=ttest(z1,z5);
[zh5,zp5]=ttest(z2,z3);
[zh6,zp6]=ttest(z2,z4);
[zh7,zp7]=ttest(z2,z5);
[zh8,zp8]=ttest(z3,z4);
[zh9,zp9]=ttest(z3,z5);
[zh10,zp10]=ttest(z4,z5);
ZP=[zp1,zp2,zp3,zp4,zp5,zp6,zp7,zp8,zp9,zp10];
ZH={[1,2],[1,3],[1,4],[1,5],[2,3],[2,4],[2,5],[3,4],[3,5],[4,5]};
ZP(ZP>statvalue)=0;
ZPH=[num2cell(ZP);ZH];