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Jan W. Krieger 2018-12-23 20:28:38 +01:00
parent 4ac14ed871
commit 8802a02232
2 changed files with 21 additions and 21 deletions
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34
test/simpletest_functionplot/README.md
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@ -44,18 +44,18 @@ In any such plot function, you can also use parameters, provided via the second
You can also use C++ functors (or function objects): You can also use C++ functors (or function objects):
```c++ ```c++
struct SincSqr { struct SincSqr {
public: public:
inline SincSqr(double amplitude): a(amplitude) {} inline SincSqr(double amplitude): a(amplitude) {}
inline double operator()(double x, void* /*params*/) { inline double operator()(double x, void* /*params*/) {
return a*sin(x)*sin(x)/x/x; return a*sin(x)*sin(x)/x/x;
} }
private: private:
double a; double a;
}; };
// ... // ...
JKQTPxFunctionLineGraph* func4=new JKQTPxFunctionLineGraph(plot); JKQTPxFunctionLineGraph* func4=new JKQTPxFunctionLineGraph(plot);
func4->set_plotFunction(SincSqr(-8)); func4->set_plotFunction(SincSqr(-8));
func4->set_title("C++ functor $-8*\\sin^2(x)/x^2$"); func4->set_title("C++ functor $-8*\\sin^2(x)/x^2$");
@ -64,13 +64,13 @@ You can also use C++ functors (or function objects):
... or simple static C functions: ... or simple static C functions:
```c++ ```c++
double sinc(double x, void* /*params*/) { double sinc(double x, void* /*params*/) {
return 10.0*sin(x)/x; return 10.0*sin(x)/x;
} }
// ... // ...
JKQTPxFunctionLineGraph* func5=new JKQTPxFunctionLineGraph(plot); JKQTPxFunctionLineGraph* func5=new JKQTPxFunctionLineGraph(plot);
func5->set_plotFunction(&sinc); func5->set_plotFunction(&sinc);
func5->set_title("static C function $10*\\sin(x)/x$"); func5->set_title("static C function $10*\\sin(x)/x$");
plot->addGraph(func5); plot->addGraph(func5);

8
test/simpletest_parsedfunctionplot/README.md
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@ -18,10 +18,10 @@ In the example in [`test/simpletest_parsedfunctionplot/simpletest_parsedfunction
JKQtPlotter* plot=new JKQtPlotter(&mainWin); JKQtPlotter* plot=new JKQtPlotter(&mainWin);
QLineEdit* edit=new QLineEdit(&mainWin); QLineEdit* edit=new QLineEdit(&mainWin);
edit->setToolTip("enter a function in dependence of the variable <tt>x</tt> and press ENTER to update the graph"); edit->setToolTip("enter a function in dependence of the variable <tt>x</tt> and press ENTER to update the graph");
// ... // ...
// 2. now we add a JKQTPxParsedFunctionLineGraph object, which will draw the function from // 2. now we add a JKQTPxParsedFunctionLineGraph object, which will draw the function from
// the line edit // the line edit
JKQTPxParsedFunctionLineGraph* parsedFunc=new JKQTPxParsedFunctionLineGraph(plot); JKQTPxParsedFunctionLineGraph* parsedFunc=new JKQTPxParsedFunctionLineGraph(plot);