Alvine Bissery wrote:
I've a problem with this program.
It seems not possible to replace a value in tata vector.
Could someone explain me ?
How can I do ?
gen tata=0
forvalues i=1/34290 {
local J=nb_exam[`i']
forvalues j=2/`J' {
replace tata[`i']=1 if (date_presc1[`i']!=date_presc`j'[`i'])
}
}
weights not allowed
--------------------------------------------------------------------------------
Stata won't let you put tata[`i'] on the left-hand side of the equals sign.
So, change the line
replace tata[`i']=1 if (date_presc1[`i']!=date_presc`j'[`i'])
to something like
replace tata = 1 if (date_presc1 != date_presc`j') in `i'
or
replace tata = 1 if (date_presc1 != date_presc`j') & _n == `i'
Joseph Coveney
P.S. I cannot follow what it is that you're trying to do, but it seems as if
there ought to be a simpler way. You're looping over both observations and
reshaped wide variables (or something), which isn't the optimum approach
with Stata in most cases. I recommend exploring whether there is some way
to "vectorize" the solution, using -generate- or -egen-, for example.
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
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