Help me: Matlab and Arduino serial monitor processing for building Ultrasonic Radar System

Programme:

clear;

clc;

delete(instrfind);

figure;

for theta=0:1:180

for i=1:1:50

x1(i)=i*cos(theta*3.14/180);

y1(i)=i*sin(theta*3.14/180);

end

plot(0,0,x1,y1,'color','g','LineWidth',10);

hold on;

end

xlabel('Distance (cm)');

for R=10:10:50

k=1;

for i=0:1:180

x(k)=R*cos(i*3.14/180);

y(k)=R*sin(i*3.14/180);

k=k+1;

end

plot(x,y,'color','k','LineWidth',4);

hold on;

end

for theta=0:30:180

for i=1:1:50

x11(i)=i*cos(theta*3.14/180);

y11(i)=i*sin(theta*3.14/180);

end

plot(0,0,x11,y11,'color','k','LineWidth',4);

hold on;

end

labels=cellstr(num2str([0:30:180]'));

text([50*cos(0);50*cos(3.18/6);50*cos(2*3.18/6);50*cos(3*3.18/6);50*cos(4*3.18/6);50*cos(5*3.18/6);50*cos(3.18)],[50*sin(0);50*sin(3.18/6);50*sin(2*3.18/6);50*sin(3*3.18/6);50*sin(4*3.18/6);50*sin(5*3.18/6);50*sin(3.18)],labels,'BackgroundColor',[.7 .9 .7]);

s=serial('COM3');

s.BaudRate=9600;

fopen(s);

while(1)

if (fscanf(s,'%f')=='.')==[1 0 0]

angle=fscanf(s,'%f');

distance=fscanf(s,'%f');

elseif (fscanf(s,'%f')=='.')==[1 0 0]

angle=fscanf(s,'%f');

distance=fscanf(s,'%f');

else

fscanf(s,'%f');

angle=fscanf(s,'%f');

distance=fscanf(s,'%f');

end

if distance>50

distance=50;

end

x3=distance*cos(angle*3.14/180);

y3=distance*sin(angle*3.14/180);

x4=50*cos(angle*3.14/180);

y4=50*sin(angle*3.14/180);

x5=distance*cos((angle+2)*3.14/180);

y5=distance*sin((angle+2)*3.14/180);

x6=50*cos((angle+2)*3.14/180);

y6=50*sin((angle+2)*3.14/180);

x7=distance*cos((angle-2)*3.14/180);

y7=distance*sin((angle-2)*3.14/180);

x8=50*cos((angle-2)*3.14/180);

y8=50*sin((angle-2)*3.14/180);

x9=distance*cos((angle+3)*3.14/180);

y9=distance*sin((angle+3)*3.14/180);

x10=50*cos((angle+3)*3.14/180);

y10=50*sin((angle+3)*3.14/180);

x11=distance*cos((angle-3)*3.14/180);

y11=distance*sin((angle-3)*3.14/180);

x12=50*cos((angle-3)*3.14/180);

y12=50*sin((angle-3)*3.14/180);

X3=distance*cos(angle*3.14/180);

Y3=distance*sin(angle*3.14/180);

X4=50*cos(angle*3.14/180);

Y4=50*sin(angle*3.14/180);

X5=0;

Y5=0;

X6=50*cos((angle+2)*3.14/180);

Y6=50*sin((angle+2)*3.14/180);

X7=0;

Y7=0;

X8=50*cos((angle-2)*3.14/180);

Y8=50*sin((angle-2)*3.14/180);

X9=0;

Y9=0;

X10=50*cos((angle+3)*3.14/180);

Y10=50*sin((angle+3)*3.14/180);

X11=0;

Y11=0;

X12=50*cos((angle-3)*3.14/180);

Y12=50*sin((angle-3)*3.14/180);

hold on;

n=plot([X3,X4,X5,X6,X7,X8,X9,X10,X11,X12],[Y3,Y4,Y5,Y6,Y7,Y8,Y9,Y10,Y11,Y12],'color','y','LineWidth',20);

m=plot([x3,x4,x5,x6,x7,x8,x9,x10,x11,x12],[y3,y4,y5,y6,y7,y8,y9,y10,y11,y12],'color','r','LineWidth',20);

drawnow;

delete(m,n);

end

fclose(s);

ERROR :

Warning: Unsuccessful read: Matching failure in format..

Warning: Unsuccessful read: A timeout occurred before the Terminator was reached..

Error using ==

Matrix dimensions must agree.

Error in Untitled (line 41)

elseif (fscanf(s,'%f')=='.')==[1 0 0]

[Ta Huu Tai]

I am from Vietnam so the language is not standard for you to understand!!