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x=0:pi/100:2*pi; y1=2*exp(-0.5*x); y2=cos(4*pi*x); plot(x,y1,x,y2) title('x from 0 to 2{\pi}'); %加图形标题 xlabel('Variable X'); %加X轴说明 ylabel('Variable Y');

x=0:pi/10:2*pi; y=2*sin(x); subplot(2,2,1);bar(x,y,'g'); title('bar(x,y,''g'')');axis([0,7,-2,2]); subplot(2,2,2);stairs(x,y,'b'); title('stairs(x,y,''b'')');axis([0,7,-2,2]); subplot(2,2,3);ste

x=0:pi/50:2*pi; y=sin(x); z=cos(x); plot(x,y,'r',x,z,'g'); %绘制两根不同曲线 Hl=get(gca,'Children'); %获取两曲线句柄向量Hl for k=1:size(Hl) if get(Hl(k),'Color')==[0 1 0] %[0 1 0]代表

x=0:pi/100:2*pi; y1=0.2*exp(-0.5*x).*cos(4*pi*x); plot(x,y1) hold on y2=2*exp(-0.5*x).*cos(pi*x); plot(x,y2); hold off

#include #include using namespace std; int main ( ) {float h,r,l,s,sq,vq,vz; const float pi=3.1415926; coutr>>h; l=2*pi*r; s=r*r*pi; sq

#include #include using namespace std; int main() {int a; couta; cout

#include using namespace std; int main() {int a=21; cout.setf(ios::showbase); cout

#include #include #include using namespace std; int main() {int s=1; double n=1,t=1,pi=0; while((fabs(t)) > 1e-7) {pi=pi+t; n=n+2; s=-s; t=s/n;

#include #define pi 3.1415 double gaussian(double x) { double resu; resu=-0.5*x*x; resu=exp(resu); resu=resu/sq

/*输入一个圆的半径，求出它的面积*/ #include “stdio.h” #define PI 3.1415926 #define area(r) PI*r*r main() { float r,a; scanf(“%f”,&r); a=area(r); printf(“The area is %f”,a); }