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From the link:<br />
&quot;Scaling is equivalent to the matrix<br />
[ Sx &nbsp;0 &nbsp; 0 ]<br />
[ 0 &nbsp; Sy &nbsp;0 ]<br />
[ 0 &nbsp; &nbsp;0 &nbsp; 1 ]&quot;<br />
<br />
So if you want to go to a coordinate system that is scaled to 3 times the size, use<br />
[ 3 0 0 ]<br />
[ 0 3 0 ]<br />
[ 0 0 1 ]<br />
<br />
And to go back, use<br />
[ 1/3 &nbsp;0 &nbsp; &nbsp; 0 ]<br />
[ &nbsp;0 &nbsp; &nbsp;1/3 &nbsp;0 ]<br />
[ &nbsp;0 &nbsp; &nbsp; 0 &nbsp; &nbsp; 1 ]<br />
<br />
If you want to scale the x and y coordinates separately, then put the x scale factor in the first row (Sx) and the y one in the next.
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From the link:
"Scaling is equivalent to the matrix
[ Sx  0   0 ]
[ 0   Sy  0 ]
[ 0    0   1 ]"

So if you want to go to a coordinate system that is scaled to 3 times the size, use
[ 3 0 0 ]
[ 0 3 0 ]
[ 0 0 1 ]

And to go back, use
[ 1/3  0     0 ]
[  0    1/3  0 ]
[  0     0     1 ]

If you want to scale the x and y coordinates separately, then put the x scale factor in the first row (Sx) and the y one in the next.

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Could anyone look at the below link and find the info on &nbsp;3x3 transformation matrices and scaling, and then tell me how I go back and forth between two coordinate systems, an original coordinate system and a scaled coordinate system. &nbsp;How do I use that matrix to do this? &nbsp;I kind of need the answer in plain English terms, because my math skills are minimal. (not what they used to be 30 years ago.). &nbsp;<br />
<br />
This page states &quot;Mathematically, all transformations can be represented as 3x3 transformation matrices of the following form...&quot;<br />
<br />
<a href="http://www.w3.org/TR/SVG/coords.html" rel="ugc">http://www.w3.org/TR/SVG/coords.html</a>
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Could anyone look at the below link and find the info on  3x3 transformation matrices and scaling, and then tell me how I go back and forth between two coordinate systems, an original coordinate system and a scaled coordinate system.  How do I use that matrix to do this?  I kind of need the answer in plain English terms, because my math skills are minimal. (not what they used to be 30 years ago.).  

This page states "Mathematically, all transformations can be represented as 3x3 transformation matrices of the following form..."

http://www.w3.org/TR/SVG/coords.html

3x3 transformation matrices

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