Creating Diagnostic Messages
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Information can be shown in a message box. For example, the following checks to see if a variable called weight exists and, if it does not, alerts the user:
if (data_file.getVariableByName("weight") == null)
alert("Data file does not contain a variable called 'weight'.");
Alternatively, we can print messages in an output windows. The following prints the value of Don’t know (see the earlier example in this chapter):
log("Don't know in the age question has the value of " + dk_value);
See also
- Next worked example.
- QScript Selection Functions.
- QScript for an explanation of how to run this code.
- QScript Reference for technical information.
- JavaScript for information about the JavaScript programming language.