google apps script - How to evaluate a spreadsheet formula within a custom function?

Google apps script - How to evaluate a spreadsheet formula within a custom function?

In Google Apps Script, you can use the evaluate() method of the SpreadsheetApp class to evaluate a spreadsheet formula within a custom function. Here's how you can do it:

function myCustomFunction(formula) { var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet(); var result = sheet.getRange('A1').setFormula(formula).getValue(); return result; }

In this example:

  • formula is the parameter passed to the custom function, which represents the formula you want to evaluate.
  • SpreadsheetApp.getActiveSpreadsheet() gets the active spreadsheet.
  • getActiveSheet() gets the currently active sheet.
  • setFormula(formula) sets the formula in cell A1 of the active sheet.
  • getValue() retrieves the value calculated by the formula.

You can then use this custom function in your spreadsheet like any other function. For example, if you have a formula in cell B1 and you want to evaluate it using your custom function, you would use:

=myCustomFunction(B1)

This will call your custom function with the formula in cell B1 as the argument, evaluate the formula, and return the result.

Examples

  1. Google Apps Script to evaluate a formula within a custom function

    Description: This query demonstrates how to use eval() in Google Apps Script to evaluate a formula provided as a string within a custom function.

    function evaluateFormula(formula) { var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet(); var result = sheet.getRange('A1').setFormula(formula).getValue(); return result; }

    This function sets formula into cell A1, evaluates it, and returns the result.

  2. Google Apps Script to handle complex formulas in custom functions

    Description: This query shows how to handle complex formulas, including those with cell references, in a Google Apps Script custom function.

    function evaluateComplexFormula(formula) { var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet(); var cell = sheet.getRange('A1'); cell.setFormula(formula); SpreadsheetApp.flush(); // Ensure formula calculation var result = cell.getValue(); return result; }

    SpreadsheetApp.flush() ensures the formula is calculated before retrieving the result from cell A1.

  3. Google Apps Script to evaluate formula with parameters

    Description: This query demonstrates passing parameters to a formula evaluation function in Google Apps Script.

    function evaluateFormulaWithParameters(formula, param1, param2) { var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet(); sheet.getRange('A1').setValue(param1); sheet.getRange('B1').setValue(param2); var result = sheet.getRange('C1').setFormula(formula).getValue(); return result; }

    This function sets param1 and param2 in cells A1 and B1, evaluates formula in C1, and returns the result.

  4. Google Apps Script to evaluate formula with dynamic range

    Description: This query shows how to evaluate a formula that dynamically adjusts based on data range in Google Apps Script.

    function evaluateDynamicFormula(formula, startCell, endCell) { var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet(); var range = sheet.getRange(startCell + ':' + endCell); range.setFormula(formula); SpreadsheetApp.flush(); // Ensure formula calculation var result = range.getValues(); // Get result values return result; }

    This function sets formula across the range from startCell to endCell, calculates it, and returns the resulting values.

  5. Google Apps Script to handle array formulas

    Description: This query demonstrates how to handle array formulas within a custom function using Google Apps Script.

    function evaluateArrayFormula(formula) { var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet(); var range = sheet.getRange('A1:A10'); range.setFormula(formula); SpreadsheetApp.flush(); // Ensure formula calculation var result = range.getValues(); // Get array formula result return result; }

    This function sets formula in range A1, calculates it, and returns the resulting array of values.

  6. Google Apps Script to evaluate formulas with conditions

    Description: This query shows how to evaluate formulas with conditions in Google Apps Script.

    function evaluateFormulaWithCondition(formula, condition) { var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet(); var range = sheet.getRange('A1'); range.setValue(condition); SpreadsheetApp.flush(); // Ensure condition is set var result = sheet.getRange('B1').setFormula(formula).getValue(); return result; }

    This function sets condition in A1, evaluates formula in B1 based on the condition, and returns the result.

  7. Google Apps Script to handle errors in formula evaluation

    Description: This query demonstrates how to handle errors that may occur during formula evaluation in Google Apps Script.

    function evaluateFormulaWithTryCatch(formula) { try { var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet(); var result = sheet.getRange('A1').setFormula(formula).getValue(); return result; } catch (e) { return 'Error: ' + e.toString(); } }

    This function attempts to evaluate formula in A1 and returns the result or an error message if evaluation fails.

  8. Google Apps Script to evaluate formulas across sheets

    Description: This query demonstrates how to evaluate formulas that span across different sheets in Google Apps Script.

    function evaluateFormulaAcrossSheets(formula, sheetName) { var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(sheetName); var result = sheet.getRange('A1').setFormula(formula).getValue(); return result; }

    This function sets formula in cell A1 of sheetName, evaluates it, and returns the result.

  9. Google Apps Script to evaluate formula with user input

    Description: This query shows how to build a custom function that prompts for user input to evaluate a formula in Google Apps Script.

    function evaluateFormulaWithPrompt() { var formula = Browser.inputBox('Enter Formula:'); var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet(); var result = sheet.getRange('A1').setFormula(formula).getValue(); return result; }

    This function prompts the user to enter formula, evaluates it in cell A1, and returns the result.

  10. Google Apps Script to evaluate formula in a specific cell

    Description: This query demonstrates how to evaluate a formula provided as input directly into a specific cell using Google Apps Script.

    function evaluateFormulaInCell(formula, cell) { var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet(); var result = sheet.getRange(cell).setFormula(formula).getValue(); return result; }

    This function sets formula in the specified cell, evaluates it, and returns the result.

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