Modify Whole Table or Plot - Hide Empty Rows and Columns
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This rule hides rows or columns for tables and charts where the primary statistic for the table is always 0% or NaN. The primary statistic is the first statistic on the Statistics - Cells list for the table. A note is added to the footer when any rows or columns have been removed.
Example
How to apply this rule
For the first time in a project
- Select the table(s)/chart(s) that you wish to apply the rule to.
- Start typing the name of the Rule into the Search features and data box in the top right of the Q window.
- Click on the Rule when it appears in the QScripts and Rules section of the search results.
OR
- Select Automate > Browse Online Library.
- Choose this rule from the list.
Additional applications of the rule
- Select a table or chart that has the rule and any table(s)/chart(s) that you wish to apply the rule to.
- Click on the Rules tab (bottom-left of the table/chart).
- Select the rule that you wish to apply.
- Click on the Apply drop-down and choose your desired option.
- Check New items to have it automatically applied to new items that you create. Use Edit > Project Options > Save as Template to create a new project template that automatically uses this rule.
Removing the rule
- Select the table(s)/chart(s) that you wish to remove the rule from.
- Press the Rules tab (bottom-right corner).
- Press Apply next to the rule you wish to remove and choose the appropriate option.
How to modify the rule
- Click on the Rules tab (bottom-left of the table/chart).
- Select the rule that you wish to modify.
- Click Edit Rule and make the desired changes. Alternatively, you can use the JavaScript below to make your own rule (see Customizing Rules).
JavaScript
You can find a simpler version of this code, which does not contain the controls, here.
includeWeb("Table JavaScript Utility Functions");
form.setSummary("Hide empty rows and columns");
// Returns true if all elements of the array are zero
function arrayElementsAllZero(array) {
var non_zero = array.filter(function(x) { return x > 0; } );
return non_zero.length == 0;
}
// Returns true if all elements of the array are NaN
function arrayElementsAllNaN(array) {
var not_nan = array.filter(function(x) { return !isNaN(x); } );
return not_nan.length == 0;
}
function arrayElementsNotSpecifiedStrings(array, strings) {
var not_string = array.filter(function (x) { return strings.indexOf(x) == -1; });
return not_string.length == 0;
}
// Obtain the primary statistics to check
var primary_statistic = table.availableStatistics[0];
var values = table.get(primary_statistic);
// Check to see if the primary statistic is a % statistic.
var is_percentage = primary_statistic.indexOf('%') != -1;
// Check to see if the table is showing a Text question
var is_text = primary_statistic == "Text";
var empty_strings = [""];
// Check for empty rows
var empty_rows = [];
for (var j = 0; j < table.numberRows; j++) {
var current_row_values = values[j];
if ( (is_percentage && arrayElementsAllZero(current_row_values)) || (arrayElementsAllNaN(current_row_values) && !is_text) || (is_text && arrayElementsNotSpecifiedStrings(current_row_values, empty_strings)))
empty_rows.push(j);
}
// Check for empty columns
var empty_columns = [];
for (var j = 0; j < table.numberColumns; j++) {
var current_column_values = [];
for (var k = 0; k < table.numberRows; k++)
current_column_values.push(values[k][j]);
if ((is_percentage && arrayElementsAllZero(current_column_values)) || (arrayElementsAllNaN(current_column_values) && !is_text) || (is_text && arrayElementsNotSpecifiedStrings(current_column_values, empty_strings)))
empty_columns.push(j);
}
// Remove empty rows
if (empty_rows.length > 0)
for (var j = empty_rows.length - 1; j > -1; j--) {
deleteRowComplete(empty_rows[j])
}
// Remove empty columns
if (empty_columns.length > 0)
for (var j = empty_columns.length - 1; j > -1; j--) {
deleteColumnComplete(empty_columns[j]);
}
// Add a note to the footer
if (empty_rows.length > 0 || empty_columns.length > 0) {
var current_footers = table.extraFooters;
current_footers.push("Some empty rows or columns have been removed");
table.extraFooters = current_footers;
}
See also
- User Input for Rules for technical information on Rules.
- Rule Online Library for other examples of Rules.
- Table JavaScript and Plot JavaScript for the JavaScript that is used to write custom rules.
- JavaScript for information about the JavaScript programming language.