for loops within while loop

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Answer 1

[VBBV]

while t1< 2 & h2 >= 0
 % your code 
end 

You could put both conditions together as above using single while loop.

[VBBV]

Initialize h2 as zero before the start of while loop since it does not exist.

[Matthew]

unfortunately this does not solve the questions two my problem. i appreciate the insight, though.

[VBBV]

if you explain the problem clearly (without dubious intentions) , its easier to get the problem solved.