Convert string to integer stata software

You can convert a string to a number by calling the parse or tryparse method found on the various numeric types int, long, double, etc. For example, the text the sky is blue could be stored to a string variable, then later in the program, that text could be. Jan 05, 2011 if you cutandpaste the spreadsheet into statas data editor, dates and datetimes paste as strings in humanreadable form. For instance, if you have a car model you could replace it by the cost of the car, or its horse power, its difficult to. Convert character array or string to numeric array. It creates an output dataset or resultsset, with one observation per row of an existing matrix, and data on the values of the column entries in that row, and, optionally, extra variables specified by the user. Also, regarding the value 0 being written in case you have an input string of na, this is expected behaviour. When you concatenate a string and an integer, the result is a string. Oct 05, 2010 to concatenate is to join the characters of 2 or more variables from end to end. As you can see from the second tabulate, region2 has the numeric values 1 through 4 but retains the strings central, east, south and west as value labels.

So its actually not an issue to convert string to int but how to concatenate string literals and integers or any other numeric type, thus im going to alter your topic title original how to convert string to integer. An example of when one might need to do this is if they needed to append. The stata blog using dates and times from other software. How do i alter it to convert this to a data format suggestions welcomed. For your string, if you have a number you can use it instead of the string itself. My comments are basically the same as the other commenter. The using variable would then be treated as if it contained. Different ways for integer to string conversions in java convert using stringint the integer class has a static method that returns a string object representing the specified int parameter. Even though stata can handly string variables, it is clear in many respects that numeric variables are much preferred. If your variable is of primitive type int, it is better to use integer. While the char function also converts numbers to characters, it does not perform the same conversion as string. The argument i is converted and returned as a string instance.

As strlen refers to the memory used and not the number of characters as they appear on the screen, the result of strlenfur will also be 4 in stata 14 in. In addition to numeric values and delimiters, input text also can include any of the following items. Text that represents a numeric matrix can contain spaces, commas, or semicolons, such as 5, 10,11,12, or 5,10. So technically, the source right now is string and the destination is numeric18,2. In the example above, a8 indicates a string variable eight characters long, and f2. Hi everyone, i would like to know how to convert an integer to a string. From text file i have read matrix and i got string. For example, you can form new strings by joining strings together or by taking strings apart. Data analysis with python and pandas convert string category to numeric values tutorial 6. Stata module to decode a numeric variable into a string variable, statistical software components s417702, boston college department of economics, revised 30 sep 20. Follow 274 views last 30 days lolipop on 20 dec 2014. I suspect you want to do this but without seeing your variable names its just guesswork. A very basic question i would appreciate help with.

When i tried, it said type mismatch i have tried the real and the encode commands, none of which are working. Stata has a wide array of tools to work with dates. So what youre asking for is technically spoken impossible. How do i convert string variables to numeric variables in stata. In stata, this can be done by using either gen or egen. Internally, the code is inefficient because there are intermediate objects that are created behind the scene. You cannot write any string values to an integer column. Quickly master the trick with a stepbystep example on downloadable practice data.

Read the help files for the full syntax but the basic idea is that destring pulls a set of characters from your string, and destring will convert a string variable to an integer or other format. My string contains only numbers, and i want to return the number it represents. The following document provides an example of how to. A string variable is a programming language construct that holds text. For instance, if you have a car model you could replace it by the cost of the car, or its horse power. Stataprofessor customized help in empirical models and data. Note that while using list, and some other data display commands, produces values that look like string dates, the actual values stored by stata are numeric. In stata this is often true because stata treats stringencoded variables as missing and will not use them in analyses. For example in the dataset 10aug2000 formatted as a string variable.

How to convert string into numeric form in spss without losing the data. I have two variables in stata, both numeric variables that have somehow been recorded as string variables. Sep 11, 2015 the ability to convert vba data types, especially strings to integers, is handy when your program relies on user input. Converting integer to string in c without sprintf go4expert. How can i quickly convert many string variables to numeric variables. While useful for a human eye, a computer cant glean much from data in this format. I want to make an integer variable out of it such that it has a new ascending value for each new unit. How to convert string into integer for linear regression quora. Change your call to recast int wtdper96, force the square brackets in the syntax diagram of the help file are there to indicate nonmandatory arguments, but you need to omit the brackets if you do decide. If the variable is actually a numeric value that just happens to be stored as a string, see our faq.

In a case where your string variables are in fact strings e. Converting numeric to string statalist the stata forum. We are here to help, but wont do your homework or help you pirate software. I tried opening up the fields under properties in arccatalog and it says i cannot change them because the tables are not empty. The direct analog of this in pandas would now be the categorical variable type which became a fullfledged part of pandas starting in 0. To join two strings, use the operator software components using stata and excel. How to convert a string to int matlab answers matlab.

Conversion functions allow you to construct new fields and convert the storage type of existing files. If str2num cannot parse the input as numeric values, then it returns an empty matrix. The following document provides an example of how to create. Copy and convert several string variables close data without saving and reopen before proceeding. Spss how to convert string variables into numeric ones. One simple solution was to use sprintf, which can be done in 23 lines, but i was temped to solve this problem without any string manipulation functions. Convert spss string variables into numeric ones the right way. I need them converted to numeric variables so that i can generate a new variable with them. Here is one example where you need to preserve the numerical format for strings. By the way, be aware that if the string is null, the call. Stata stores dates as the number of days since 01jan1960, and datetimes as the number of milliseconds since 01jan1960 00. Cross sectional units in my panel data set are currently identified by names string variables. Data conversion string to numeric solutions experts. Converting string variable to double or viceversa statalist.

Press question mark to learn the rest of the keyboard shortcuts. The first tabulate looks identical to the tabulate done on the string variable region above. The first line of syntax reads in the dataset shown above. In this post, i will provide a brief tour of working with dates that will help you get started using all of statas tools. To concatenate is to join the characters of 2 or more variables from end to end. Statas encode command starts with a string variable and creates a new integer variable with labels mapped to the original string variable. To convert a string variable to a numeric variable num, use the number function, for example.

The second command formats the numeric value so that when stata displays the date, it is in a form that is easy for humans to read. The easiest way to convert string variables to numeric form is to use the encode command. You will be able to check to see if the user entered a string in the correct format, then you can convert the string to an integer and use it in loops, counters, conditional statements and mathematical expressions. Different ways for integer to string conversions in java.

How to convert string into integer for linear regression. How can i convert string variables to numeric variables in. Not least, most statistical procedures just do not accept string variables. It is not recommended for converting floatingpoint numbers to strings that represent them. In earlier versions, a string variable could contain up to 244 characters. Convert character array or string to numeric array matlab. Rather, it converts numbers to individual characters for example, converting 65 to the letter a. Suppose you have a 6digit numeric observation id, code, where the first 2 digits represent geographic code and the last 4 digits represent unique observation codes, and you want to generate a new variable, reg, that represents the 2digit geographic code. Convert a positive integer to a character type of binary base.

How to convert categorical string variables to labeled numeric variables. You can have dates in years, months, or even milliseconds. How can i quickly convert many string variables to numeric. The output dataset created by xsvmat may be listed to the stata log, or saved to a disk file, or written to. How to convert string to matrix matlab answers matlab. If you use a conversion package, most know to convert the date for you. Most software stores dates and times numerically, as durations from some sentinel date, but they differ on the sentinel date and on the units in which the duration is stored. X str2numchr converts a character array or string scalar to a numeric matrix. Unlike decode, sdecode creates an output string variable containing the values of the input variable as output by the list command and other stata output, instead of decoding all unlabelled input values to missing. Hi, whos got bright ideas to convert string variables to date variables.

How can i turn a string variable containing dates into a. Convert a positive integer to a character type of hexadecimal base. Converting numeric into string using the value labels. The input can include spaces, commas, and semicolons to indicate separate elements. The first case most often occurs when importing data from another source. How to convert string into numeric form in spss without. Also, the replace option of tostring doesnt take other parameters. If you have more than 67,784 unique values of the string variables that you are encoding, encode will complain. This question, or a some variation of it, is one of the most common icdrelated topics that we see in technical support.

This module may be installed from within stata by typing ssc install sdecode. Learn more about data, strings, number, convert, workspace. There are cases when we wish to convert a java integer to string but using another base. When you look at the documentation, you will find that a string which is not a number always is converted to value 0. So, i tried using the force option but then stata replaces part of the code by missing values. How can i convert a string variable to a double or viceversa. Customized software components using stata and excel. Often data is imported into stata with string format dates such as 10091986 or 9oct1986.

For dates on or after 01mar1900, excel 1900 date system stores dates as days since 30dec1899. Java how to design login and register form in java. In spss, how do i convert between numeric variables and. Reed college stata help changing string variables to. The int2str, num2str, and mat2str functions convert numeric values to strings where each character represents a separate digit. As example, suppose we have the variables var1, var2, and var3. Fortunately, stata offers some easy ways for converting string to numeric variables and vice versa. As an example, the german word fur is a string of length three in stata, but the string length is four in stata 14. Representation of a numeric matrix, specified as a character array or string scalar.

You could specify appends force option to ignore this stringnumeric mismatch. This also influences the results of functions such as strlen. One method of converting numbers stored as strings into numerical variables is to use a string function called real that translates numeric values stored as strings into numeric values stata can recognize as such. If a type is specified, the result returned by exp must be string or numeric according to whether type is string or numeric. Convert a numeric type to a character type of the specified precision, returning a string matlab can evaluate. But if your variable is already an instance of integer wrapper class of the primitive type int, it is better to. Today while solving a problem, i had to convert integers to string in c to use its indexing capabilities. The char function converts integers to unicode character codes and returns a string composed of the equivalent characters x 77 65 84 76 65 66.

How do i convert string variables to numeric variables in. Therefore, stata offers tools to turn these date strings into values that, while still displaying sensical data to humans, are encoded in a numeric format that stata likes. That will give you a list of values that stata did not destring and you can make the changes to the new variable as needed. If the number is negative, the sign will be preserved.

Running this command will cause stata to make a new numeric categorical variable wherein the data has labels that correspond to the old string values. Convert class if you have a string, it is slightly more efficient and straightforward to call a tryparse. However, anticipating that this may be problematic, stata offers various commands to change string variables into categorical variables and vice versa. On april 23, 2014, statalist moved from an email list to a forum. How to convert a string to int matlab answers matlab central. If n contains floatingpoint values, int2str rounds them before conversion. For example, given the string 1234 the result should be the number 1234. How can i convert string variables to numeric variables in stata.