Change Cx, Cy and Circle ray Raphael.js

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I used the Raphael library to create a certain chart. I want to change its position and its radius. How can I do this?

Example jsfiddle: http://jsfiddle.net/tttxfvcu/6/

javascript

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In the following expression X controls the position of the center and Y the radius of the arc: 

x1 = parseInt(Math.round(X + Y * Math.cos(Math.PI * startAngle / 180)));

The same values should be used in this expression:
Ex. for x=200 and Y=195 

var d = "M200,200  L" + x1 + "," + y1 + "  A195,195 0 " + ((endAngle - startAngle > 180) ? 1 : 0) + ",1 " + x2 + "," + y2 + "

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