substr(s,b,l)returns the substring ofASCII stringsstarting at positionband continuing for alength ofl, where bspecifies the starting position the first character of the string isb=1. …iclenum=dm0058 for a tutorial making that point and others. Commands and functions are disjoint in Stata. For example, an alternative would be to be followed later by compress.įirst, substr() is a function, not a command. We can rely on Stata to work out the appropriate string type when it replaces plaintiff by the desired string. How can we use Stata to work out string types? exp() returns real if Z is real and complex if Z is complex. exp(Z) returns the elementwise exponentiation of Z. What is a byte in Stata? What does EXP mean Stata?ĭescription. The by varlist: prefix causes Stata to repeat a command for each subset of the data for which the values of the variables in varlist are equal. The default data storage type for Stata is “float.” By inquiring with Stata using the help command, we see that the float variable type is much larger relative to. Here we can see that the storage type is listed as “byte.” Byte indicates that the variable is stored as an integer between -127 and 100.
The values of string variables are red in the data browser (like make in this data set) so if you start seeing red where you shouldn’t you know you’ve got a problem. It’s a common mistake when importing data to accidentally make Stata think a numeric variable is a string. On debugging: Stata will stop with an error message as soon as it hits a problem. In your examples, possibly year is a string variable somehow. What is a type mismatch error in Stata?Ī type mismatch means that you trying to do something numeric to strings, or vice versa. Tokens are determined based on the parsing characters pchars, which default to a space if not specified. tokenize divides string into tokens, storing the result in ‘1’, ‘2’, (the positional local macros). All occurrences are changed if cnt contains missing. Subinstr(s, old, new, cnt) returns s with the first cnt occurrences of old changed to new. When arguments are not scalar, substr() returns element-by-element results. If there is a binary 0 to the right of b, the substring from b up to but not including the binary 0 is returned. Substr(s, b, l) returns the substring of ASCII string s starting at position b and continuing for a length of l characters.
How can we use Stata to work out string types?.What is a type mismatch error in Stata?.
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