Arc length: Difference between revisions
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A WASSERMANN (talk | contribs) No edit summary |
A WASSERMANN (talk | contribs) No edit summary |
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var brd = JXG.JSXGraph.initBoard('box', {axis:true, originX: 400, originY: 300, grid:true, unitX: 50, unitY: 50}); | var brd = JXG.JSXGraph.initBoard('box', {axis:true, originX: 400, originY: 300, grid:true, unitX: 50, unitY: 50}); | ||
var n = brd.createElement('slider',[[1,3],[5,3],[1,10,50]],{name:'n'}); | var n = brd.createElement('slider',[[1,3],[5,3],[1,10,50]],{name:'n'}); | ||
var f = function(x){ return 0.2*x*x+0 | var f = function(x){ return 0.2*x*x+2.0*Math.sin(x); } | ||
var plot = brd.createElement('functiongraph',[f]); | var plot = brd.createElement('functiongraph',[f]); | ||
var start -1.0; | |||
var end = 5.0; | |||
var sc = brd.createElement('curve',[[0],[0]]); | var sc = brd.createElement('curve',[[0],[0]]); | ||
sc.updateDataArray = function() { | sc.updateDataArray = function() { | ||
| Line 10: | Line 11: | ||
var m = n.Value(); | var m = n.Value(); | ||
m = Math.floor(m); | m = Math.floor(m); | ||
var d = ( | var d = (end-start)/m; | ||
this.dataX = []; | this.dataX = []; | ||
this.dataY = []; | this.dataY = []; | ||
this.dataX[0] = | this.dataX[0] = start; | ||
this.dataY[0] = f( | this.dataY[0] = f(start); | ||
for (i=1;i<=m;i++) { | for (i=1;i<=m;i++) { | ||
this.dataX.push( | this.dataX.push(start+i*d); | ||
this.dataY.push(f( | this.dataY.push(f(start+(i-1)*d)); | ||
this.dataX.push( | this.dataX.push(start+i*d); | ||
this.dataY.push(f( | this.dataY.push(f(start+i*d)); | ||
} | } | ||
} | } | ||
| Line 27: | Line 28: | ||
var m = n.Value(); | var m = n.Value(); | ||
m = Math.floor(m); | m = Math.floor(m); | ||
var d = ( | var d = (end-start)/m; | ||
this.dataX = []; | this.dataX = []; | ||
this.dataY = []; | this.dataY = []; | ||
this.dataX[0] = | this.dataX[0] = start; | ||
this.dataY[0] = f( | this.dataY[0] = f(start); | ||
for (i=1;i<=m;i++) { | for (i=1;i<=m;i++) { | ||
this.dataX.push( | this.dataX.push(start+i*d); | ||
this.dataY.push(f( | this.dataY.push(f(start+i*d)); | ||
} | } | ||
} | } | ||
