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private java scripts 0; } ParamString = getParameter("xmax"); if (ParamString != null) { xmax = Double.valueOf(ParamString).doubleValue(); } else { xmax = 1.0; } ParamString = getParameter("ymax"); if (ParamString != null) { ymax = Double.valueOf(ParamString).
private java scripts doubleValue(); } else { ymax = 1.0; } ParamString = getParameter("ymin"); if (ParamString != null) { ymin = Double.valueOf(ParamString).doubleValue(); } else { ymin = -1.0; } } public void paint(Graphics g) { double x1,y1,x2,y2; int i, j1, j2; j1 = yvalue(0); for (i = 0; i < AppletWidth; i++) { j2 = yvalue(i+1); g.
private java scripts drawLine(i, j1 ,i+1, j2); j1 = j2; } } private int yvalue(int ivalue) { // Given the xpoint we're given calculate the Cartesian equivalent double x, y; int jvalue; x = (ivalue * (xmax - xmin)/(AppletWidth - 1)) + xmin; // Take the sine of that x y = Math.sin(x); // Scale y into window coordinates jvalue = (int) ((y - ymin)*(AppletHeight - 1)/(ymax - ymin)); // Switch jvalue from cartesian coordinates to computer graphics coordinates jvalue = AppletHeight - jvalue; return jvalue; } } Now we can adjust the range over which we graph without modifying our code!So far we've only graphed sine functions. It should be obvious how to modify the code to graph cosines or many other kinds of functions. However what if we want to define the function at runtime? Exercises Add labeled coordinate axes to the graph.Our graph method handled mathematical functions.
private java scripts
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