2022年matlab經(jīng)典的小程序

1、Num2str 變數(shù)值為字符串 Int2str 變整數(shù)為字符串Str2num 變字符串為數(shù)值Sprintf 變數(shù)值為格式把握下的字符串Sscanf 變字符串為格式把握下的數(shù)值1. 分段函數(shù)for x=-pi*6:pi/10:6*pi y=sinx; if y0 y=0; end fprintfx=%f,y=%fn,x,y; end 2運(yùn)算距離x1=inputenter the x1: ; y1=inputenter the y1: ; x2=inputenter the x2: ; y2=inputenter the y2: ; d=sqrtx1-x2.2+y1-y2.2; fprintfth

2、e distance of the two points is :%f,d; v0=inputEnter the h0=inputEnter the t=0:0.01:5 初速度 v0:; 離地高度 h0:; 3重力加速度h=-0.5*9.81*t.2+v0*t+h0; v=-9.81*t+v0; plott,h,k-,t,v,b-; title Plot of ht and vt; xlabelt; ylabelhtandvt; legendht,vt; 4. 坐標(biāo)轉(zhuǎn)換function x, y = polar2rectr, theta x = r * costheta * pi/180;

3、y = r * sintheta * pi/180; 5. 坐標(biāo)轉(zhuǎn)換,帶參數(shù)檢驗(yàn)function mag, angle = polar_valuex, y msg = nargchk1,2,nargin; errormsg; % If the y argument is missing, set it to 0. if nargin 2 y = 0; end % Check for 0,0 input argument, and print out % a warning message. if x = 0 & y = 0 msg = Both x and y are zero: angle

4、is meaningless.; warningmsg; end % Now calculate the magnitude mag = sqrtx .2 + y .2; % If the second output argument is present,calculate % angle in degrees if nargout = 2 angle = atan2y,x * 180/pi; end 6. 三維螺旋線t = 0:pi/50:10*pi; plot3sint,cost,t grid on axis square 7.subplot figure1; subplot2,1,1;

5、 x=-pi:pi/20:pi; y=sinx; plotx,y; titleSubplot 1 title; subplot2,1,2; x=-pi:pi/20:pi; y=cosx; plotx,y; titleSubplot 2 title; 8Figure figure1; x=x:0.05:2; y1=expx; plotx,y1; figure2; y2=exp-x; plotx,y2; 9. 保持x=-pi:pi/20:pi; y1=sinx; y2=cosx; plotx,y1,b-; hold on; plotx,y2,k-; hold off; legend sin x,cos x; 10. 極坐標(biāo)繪圖g = 0.5; theta = 0:pi/20:2*pi; gain = 2*g*1+costheta; % Plot gain polar theta,gain,r-; title Gain versus angle ittheta; 11. 顏色把握x=0:pi/15:4*pi; y=ex