# Learning Journey

## Pattern Matching in Power Query

In Power Query there is no tool yet for matching regular expressions (patterns).
Only in Power BI we can run scripts in R and Python, hopefully these languages will be added to Excel Power Query.

Until then, to solve this problem, with a little imagination, we can design our own pattern matching process.

## LEN function type: Text

Description: Returns the number of characters in a text string
LEN is a basic function widely used, many formulas built for text processing will need this function.

Take a look at the advanced applications examples:

Applications:

## SUBSTITUTE function type: Text

Description: Substitutes the old text with new text in a text string

Beyond its basic use, which is fairly simple, the SUBSTITUTE function can be very useful combined with other functions, to get your desired results.
Take a look at the advanced applications examples:

Applications:

## What is a Defined Name?

In Excel, you have the option to assign a Name to a cell, or to a Range of cells. This name is reffered to as a Defined Name.

A Defined Name will give more flexibility than before, you can refer to it in your formulas, or chart series.

Also, the name can be located anywhere in your workbook, you don’t need to use cell or range references.

## Selecting Excel Table Components

Selecting Excel Table Components is slightly different from selecting normal ranges in a worksheet, because we have 3 Excel Table Components which are special ranges: Read More

## Order of Precedence

The Order of Precedence used by Excel to calculate formulas is extremely important to know when building complex formulas.

Of course, Excel will respect all mathematical rules you learned in school, there are only a few more Operators in Excel: the Range Operators, single Space Operator, Union Operator, the Concatenation Operator and the Exponentiation Operator.

# What is a Defined Table?

An Excel Defined Table is a special object in Excel which adds a lot of new options and functionalities when working with data ranges. With Defined Tables, you can manipulate data more easily than before, adding power and flexibility to your applications.

To create a Defined Table, select the data range, or simply select any cell within the data range, and click the Table button from the Insert tab from Ribbon. The keyboard shortcut key is Ctrl+T to create a Defined Table.

## There are 3 Reference Operators in Excel:

1.   “:” (colon) is the Range operator, which produces one reference to all the cells between two cells references, including the cells written in the reference text, like: A11:A13
2.  “,” (comma) is the Union operator, which combines multiple Ranges into one reference, like  A11:A13 , A11:C11 , A11 (you can refer to simple cells too, not only to ranges with multiple cells)
3.  ” ” (space) is the Intersection operator, which returns a reference to the cell or to the range of cells found at the intersection of the ranges. In this example, only cell A11 is found in both ranges:  A11:A13  A11:C11

## How can the Cell Modes affect your work?

When you try to edit a Conditional Formatting formula, and you click the left or right arrows to move across formula’s text, Excel inserts unwanted cell references. Same thing happens when you try to create or edit a Defined Name formula, or a Chart series…

If you are not aware of the active Cell Mode, then working with formulas, defined names formulas or conditional formatting formulas, editing chart series can become very annoying.

The Excel Learning Journey that I propose for you, is structured in such a way as to offer you the most practical way to learn Excel, free.