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CS2130:Section 1.5 - Revision history
2026-05-26T13:52:32Z
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Grant: WIP: matricies
2024-02-29T01:07:30Z
<p>WIP: matricies</p>
<p><b>New page</b></p><div>== Matricies ==<br />
<br />
=== Addition ===<br />
Each matrix must be the same size (width & height must be the same)<br />
<br />
<math>\begin{bmatrix} 1 & 2 \\ 3 & 4 \end{bmatrix}<br />
+<br />
\begin{bmatrix} 0 & -1 \\ 2 & -2 \end{bmatrix}<br />
=<br />
\begin{bmatrix} 1 & 1 \\ 5 & 2 \end{bmatrix}</math><br />
<br />
=== Multiplication ===<br />
<math>M[a,b] \times N[c,d]</math><br />
<br />
<math>b = c</math> (M's height equals N's width)<br />
<br />
Resulting dimensions will be <math>[a,d]</math><br />
<br />
<math>\begin{bmatrix} 1 & 2 \\ 3 & 4 \end{bmatrix}<br />
\times<br />
\begin{bmatrix} 0 & -1 \\ 2 & -2 \end{bmatrix}<br />
=<br />
\begin{bmatrix} (1*0)+(2*2) & (1*-1)+(2*-2) \\ (3*0)+(4*2) & (3*-1)+(4*-2) \end{bmatrix}<br />
=<br />
\begin{bmatrix} 4 & -5 \\ 8 & -11 \end{bmatrix}</math></div>
Grant