Further Examples: MapAt

This specifies that f is mapped across the list at position only.

In[1]:=

Out[1]=

Here f is mapped on the second position of the first element.

In[2]:=

Out[2]=

To avoid ambiguity when there is more than one part specification, you must put each of them in a separate sublist.

In[3]:=

Out[3]=

In[4]:=

Out[4]=

Here is a matrix.

In[5]:=

Out[5]//MatrixForm=

This replaces all the elements of the second row and the first element of the third row by zeros.

In[6]:=

Out[6]//MatrixForm=

In[7]:=