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[graph=-1,1,-1,1] 'x*sin(x)+0.2*sin(7*x)*0.3*0.1*sin(7*x)+0.1*sin(9*x)*cos(2*x)'[/graph]

[graph=-1,1,-1,1] 'x*sin(x*7)*sqrt(x*3)*sin(x*3)'[/graph]

De 'mexican hat' wavelet, altijd leuk!

[graph=-4,4,-2.5,2.5]'-(4*pow(x,2) - 2)*exp(-pow(x,2))'[/graph]