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# pls help me... MATLAB function problem

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#### baya

##### Newbie level 1
bpsk=cp.*mod

%Example:
objectId=14328&objectType=FILE
if nargin >2
error('Too many input arguments')
elseif nargin ==1
f=1;
end

if f<1;
error('Frequency must be bigger than 1')
end

t=0:2*pi/99:2*pi;
cp=[];sp=[];
mod=[];mod1=[];bit=[];

for n=1:length(g);
if g==0;
die=ones(1,100);
se=zeros(1,100);
else g==1;
die=2*ones(1,100);
se=ones(1,100);
end
c=sin(f*t);
cp=[cp die];
mod=[mod c];
bit=[bit se];c
end

subplot(2,1,1);plot(bit,'LineWidth',1.5);grid on;
title('Binary Signal');
axis([0 100*length(g) -2.5 2.5]);

axis([0 100*length(g) -2.5 2.5]);

function fskd(g,f0,f1)
%FSK modulation
objectId=a4328
objectType=FILE
if nargin >3
error('Too many input arguments')
elseif nargin==1
f0=1;f1=2;
elseif nargin==2
f1=2;
end

va10=ceil(f0)-f0;
va11=ceil(f1)-f1;
if val0~=0 || val1 ~=0;
error('Frequency must be an integer');
end

if f0<1 || f1<1;
error('Frequency must be bigger than 1');
end

t=0:2*pi/99:2*pi;
cp=[];sp=[];
mod=[];mod1=[];bit=[];

for n=1:length(g);
if g==0;
die=ones(1,100);
c=sin(f0*t);
se=zeros(1,100);
else g==1;
die=ones(1,100);
c=sin(f1*t);
se=ones(1,100);
end
cp=[cp die];
mod=[mod c];
bit=[bit se];
end

subplot(2,1,1);plot(bit,'LineWidth',1.5);grid on;
title('Binary Signal');
axis([0 100*length(g) -2.5 2.5]);

title('FSK modulation');
axis([0 100*length(g) -2.5 2.5]);

function bpskd(g,f)
%Modulation BPSK
objectId=14328
objectType=FILE
if nargin > 2
error('Too many input arguments');
elseif nargin==1
f=1;
end

if f<1;
error('Frequency must be bigger than 1');
end

t=0:2*pi/99:2*pi;
cp=[];sp=[];
mod=[];mod1=[];bit=[];

for n=1:length(g);
if g==0;
die=-ones(1,100);
se=zeros(1,100);
else g==1;
die=ones(1,100);
se=ones(1,100);
end
c=sin(f*t);
cp=[cp die];
mod=[mod c];
bit=[bit se];
end

bpsk=cp.*mod
subplot(2,1,1);plot(bit,'LineWidth', 1.5);grid on;
axis([0 100*length(g) -2.5 2.5]);

i got this source code from my lect...but when im running this source code..there are an error which are cannot define the function of variable objectType...

can somebody help me to solve this prob.

TQ!

my friend, these are just functions which must be recalled by other code.

try to type in the matlab prompt the following:

help function

and see the results

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