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1.10.5 Entering Tables and Matrices
The Mathematica front end typically provides a
Create Table/Matrix/Palette
menu item which allows you to create a blank array with any specified number of rows and columns. Once you have such an array, you can then edit it to fill in whatever elements you want.
Mathematica treats an array like this as a matrix represented by a list of lists.
In[1]:= 
Out[1]= 
Putting parentheses around the array makes it look more like a matrix, but does not affect its interpretation.
In[2]:= 
Out[2]= 
Using MatrixForm tells Mathematica to display the result of the Transpose as a matrix.
In[3]:= 
Out[3]//MatrixForm= 
Entering tables and matrices.
Note that you can use   , and ↵ to start building up an array, and particularly for small arrays this is often more convenient than using the
Create Table/Matrix/Palette
menu item.
Section 2.8.11 will describe how to adjust many aspects of the appearance of arrays you create in Mathematica. The
Create Table/Matrix/Palette
menu item typically allows you to make basic adjustments, such as drawing lines between rows or columns.
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