Sample pspp syntax series#

Thus, you may create a variable that tells you how many of the values actually are missing per case. This may be easily done, since missing values can be listed among the values you are looking for. Thus, it will usually be necessary to take missing values into account somehow. A person who has answered all of the 5 questions and has agreed 2 out of 5 times will have the same numbers of agreements as a person who has answered only 2 of these questions and has agreed in these two cases.

Consider the case we mentioned above: We have, say, 5 items about certain policies and look for the respondents' agreement. Thus, if you are looking for value 1 in a given variable, and the value for a case is 'missing', then the left hand variable will not be augmented by 1. Missing values are treated like any other values. Thus, the number of correct answers may be easily computed. Thus, we will compute:ĬOUNT proenvir = env1 env2 env3 env4 env5 (4,5).įinally, consider a teacher who has given a test to kids and has coded, for each test item, whether the answer is correct ( value of 1) or not (value 0).

Sample pspp syntax series#

Next example: Often, we wish to know how often a respondent has given a certain answer to a series of questions, e.g., whether he is in favour of certain policies (say, values 4 and 5) or not (other values). If the age of the household members is stored in variables age1 to age8, you will proceed as follows:ĬOUNT numbkids = age1 age2 age3 age4 age5 age6 age7 age8 (1 thru 17). To compute the net equivalent household income, you will have to know, for instance, how many household members under 18 are present. In household surveys, typically there are data such as age and gender for each household member. Nonetheless, there are instances where it is very useful. The count command is not used as frequently as other commands for data transformation. If you are COUNTing the same values for several variables, these values do not have to be listed after each of the variables rather, they may be listed after the last of these variables, as in the simple example above. Thus, if there are, e.g., 4 variables on the right hand, and a case has the value(s) you are looking for in 2 of these variables, this case will have the value 2 in the variable on the left hand. If this is true, the value of the variable on the left hand is augmented by 1. Then it checks for each variable mentioned on the right hand whether a case has the value (or one of the values) that are listed in the parentheses that follow the variable. This command counts the frequency of the occurrence of one or several data values over several variables.ĬOUNT newvar = var_a var_b var_c var_d (1,2).ĬOUNT newvar = var_a (3) var_b (4) var_c (1,7, 10 thru 13) var_d (1,2).ĬOUNT first sets the value of the variable named on the left hand of the equal sign to zero.