Why vector don't equal when differentiating sin(pi*x)
0
I don't understand why i keep getting
Error using plot Vectors must be the same length
As the data shows s1=1X100 and s2=1X99 which i don't understand why it has that data.
clc;
%differentiation and integration:
%Waveform of sine(pi*x):
sym('x');
s= sin(pi*x1);
x1= linspace(0,4);
subplot(2,1,1);
plot(x1,s)
axis([0 4 -4 4]);
subplot(2,1,2);
s1= diff(s);
plot(x1,s1) % Error at this line
matlab vector plot
asked Nov 16 '18 at 5:15
Anime LoverAnime Lover
32
add a comment |
0
I don't understand why i keep getting
Error using plot Vectors must be the same length
As the data shows s1=1X100 and s2=1X99 which i don't understand why it has that data.
clc;
%differentiation and integration:
%Waveform of sine(pi*x):
sym('x');
s= sin(pi*x1);
x1= linspace(0,4);
subplot(2,1,1);
plot(x1,s)
axis([0 4 -4 4]);
subplot(2,1,2);
s1= diff(s);
plot(x1,s1) % Error at this line
matlab vector plot
asked Nov 16 '18 at 5:15
Anime LoverAnime Lover
32
5
Hi, you should read the documentation ofdiff:If x is a vector of length m, then y=diff(x) returns a vector of length m-1. One possible solution for your problem would be:s1=[0 s1]
– Irreducible
Nov 16 '18 at 6:31
The symbolic variablexis never used andx1is defined out of order. Please provide a Rundle example.
– Mad Physicist
Nov 16 '18 at 7:04
@Irreductible, this is actually the answer to the question, you should post it as an answer
– Brice
Nov 16 '18 at 8:34
add a comment |
0
0
0
I don't understand why i keep getting
Error using plot Vectors must be the same length
As the data shows s1=1X100 and s2=1X99 which i don't understand why it has that data.
clc;
%differentiation and integration:
%Waveform of sine(pi*x):
sym('x');
s= sin(pi*x1);
x1= linspace(0,4);
subplot(2,1,1);
plot(x1,s)
axis([0 4 -4 4]);
subplot(2,1,2);
s1= diff(s);
plot(x1,s1) % Error at this line
matlab vector plot
asked Nov 16 '18 at 5:15
Anime LoverAnime Lover
32
I don't understand why i keep getting
Error using plot Vectors must be the same length
As the data shows s1=1X100 and s2=1X99 which i don't understand why it has that data.
clc;
%differentiation and integration:
%Waveform of sine(pi*x):
sym('x');
s= sin(pi*x1);
x1= linspace(0,4);
subplot(2,1,1);
plot(x1,s)
axis([0 4 -4 4]);
subplot(2,1,2);
s1= diff(s);
plot(x1,s1) % Error at this line
matlab vector plot
matlab vector plot
asked Nov 16 '18 at 5:15
Anime LoverAnime Lover
32
asked Nov 16 '18 at 5:15
Anime LoverAnime Lover
32
asked Nov 16 '18 at 5:15
Anime LoverAnime Lover
32
asked Nov 16 '18 at 5:15
Anime LoverAnime Lover
32
asked Nov 16 '18 at 5:15
Anime LoverAnime Lover
32
32
5
Hi, you should read the documentation ofdiff:If x is a vector of length m, then y=diff(x) returns a vector of length m-1. One possible solution for your problem would be:s1=[0 s1]
– Irreducible
Nov 16 '18 at 6:31
The symbolic variablexis never used andx1is defined out of order. Please provide a Rundle example.
– Mad Physicist
Nov 16 '18 at 7:04
@Irreductible, this is actually the answer to the question, you should post it as an answer
– Brice
Nov 16 '18 at 8:34
add a comment |
5
Hi, you should read the documentation ofdiff:If x is a vector of length m, then y=diff(x) returns a vector of length m-1. One possible solution for your problem would be:s1=[0 s1]
– Irreducible
Nov 16 '18 at 6:31
The symbolic variablexis never used andx1is defined out of order. Please provide a Rundle example.
– Mad Physicist
Nov 16 '18 at 7:04
@Irreductible, this is actually the answer to the question, you should post it as an answer
– Brice
Nov 16 '18 at 8:34
5
5
Hi, you should read the documentation of
diff: If x is a vector of length m, then y=diff(x) returns a vector of length m-1. One possible solution for your problem would be: s1=[0 s1]– Irreducible
Nov 16 '18 at 6:31
Hi, you should read the documentation of
diff: If x is a vector of length m, then y=diff(x) returns a vector of length m-1. One possible solution for your problem would be: s1=[0 s1]– Irreducible
Nov 16 '18 at 6:31
The symbolic variable
x is never used and x1 is defined out of order. Please provide a Rundle example.– Mad Physicist
Nov 16 '18 at 7:04
The symbolic variable
x is never used and x1 is defined out of order. Please provide a Rundle example.– Mad Physicist
Nov 16 '18 at 7:04
@Irreductible, this is actually the answer to the question, you should post it as an answer
– Brice
Nov 16 '18 at 8:34
@Irreductible, this is actually the answer to the question, you should post it as an answer
– Brice
Nov 16 '18 at 8:34
add a comment |
2 Answers
2
active
oldest
votes
0
As mentioned in the comments
You should read the documentation of diff:
If x is a vector of length m, then y=diff(x) returns a vector of length m-1.
One possible solution for your problem would be:
s1=[0 s1]
answered Nov 16 '18 at 11:08
IrreducibleIrreducible
668720
add a comment |
-1
You have to substitute the value of x in the sym objects s and s1 using subs. After that it will be converted to double and then you can plot them.
syms x;
s= sin(pi*x);
x= linspace(0,4);
subplot(2,1,1);
sr = subs(s,x) ;
plot(x,sr);
axis([0 4 -4 4]);
subplot(2,1,2);
s1= diff(s);
s1r = subs(s1,x) ;
plot(x,s1r)
YOu need not to use syms actually.
x= linspace(0,4);
s= sin(pi*x);
subplot(2,1,1);
plot(x,s);
axis([0 4 -4 4]);
subplot(2,1,2);
s1= gradient(s);
plot(x,s1)
answered Nov 16 '18 at 7:01
Siva Srinivas KolukulaSiva Srinivas Kolukula
1,1351613
1
xis never used in OP's code.
– Mad Physicist
Nov 16 '18 at 7:04
If that was the case, code would crash at the first plot attempt, not the second one
– Brice
Nov 16 '18 at 8:33
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
As mentioned in the comments
You should read the documentation of diff:
If x is a vector of length m, then y=diff(x) returns a vector of length m-1.
One possible solution for your problem would be:
s1=[0 s1]
answered Nov 16 '18 at 11:08
IrreducibleIrreducible
668720
add a comment |
0
As mentioned in the comments
You should read the documentation of diff:
If x is a vector of length m, then y=diff(x) returns a vector of length m-1.
One possible solution for your problem would be:
s1=[0 s1]
answered Nov 16 '18 at 11:08
IrreducibleIrreducible
668720
add a comment |
0
0
0
As mentioned in the comments
You should read the documentation of diff:
If x is a vector of length m, then y=diff(x) returns a vector of length m-1.
One possible solution for your problem would be:
s1=[0 s1]
answered Nov 16 '18 at 11:08
IrreducibleIrreducible
668720
As mentioned in the comments
You should read the documentation of diff:
If x is a vector of length m, then y=diff(x) returns a vector of length m-1.
One possible solution for your problem would be:
s1=[0 s1]
answered Nov 16 '18 at 11:08
IrreducibleIrreducible
668720
answered Nov 16 '18 at 11:08
IrreducibleIrreducible
668720
answered Nov 16 '18 at 11:08
IrreducibleIrreducible
668720
answered Nov 16 '18 at 11:08
IrreducibleIrreducible
668720
668720
add a comment |
add a comment |
-1
You have to substitute the value of x in the sym objects s and s1 using subs. After that it will be converted to double and then you can plot them.
syms x;
s= sin(pi*x);
x= linspace(0,4);
subplot(2,1,1);
sr = subs(s,x) ;
plot(x,sr);
axis([0 4 -4 4]);
subplot(2,1,2);
s1= diff(s);
s1r = subs(s1,x) ;
plot(x,s1r)
YOu need not to use syms actually.
x= linspace(0,4);
s= sin(pi*x);
subplot(2,1,1);
plot(x,s);
axis([0 4 -4 4]);
subplot(2,1,2);
s1= gradient(s);
plot(x,s1)
answered Nov 16 '18 at 7:01
Siva Srinivas KolukulaSiva Srinivas Kolukula
1,1351613
1
xis never used in OP's code.
– Mad Physicist
Nov 16 '18 at 7:04
If that was the case, code would crash at the first plot attempt, not the second one
– Brice
Nov 16 '18 at 8:33
add a comment |
-1
You have to substitute the value of x in the sym objects s and s1 using subs. After that it will be converted to double and then you can plot them.
syms x;
s= sin(pi*x);
x= linspace(0,4);
subplot(2,1,1);
sr = subs(s,x) ;
plot(x,sr);
axis([0 4 -4 4]);
subplot(2,1,2);
s1= diff(s);
s1r = subs(s1,x) ;
plot(x,s1r)
YOu need not to use syms actually.
x= linspace(0,4);
s= sin(pi*x);
subplot(2,1,1);
plot(x,s);
axis([0 4 -4 4]);
subplot(2,1,2);
s1= gradient(s);
plot(x,s1)
answered Nov 16 '18 at 7:01
Siva Srinivas KolukulaSiva Srinivas Kolukula
1,1351613
1
xis never used in OP's code.
– Mad Physicist
Nov 16 '18 at 7:04
If that was the case, code would crash at the first plot attempt, not the second one
– Brice
Nov 16 '18 at 8:33
add a comment |
-1
-1
-1
You have to substitute the value of x in the sym objects s and s1 using subs. After that it will be converted to double and then you can plot them.
syms x;
s= sin(pi*x);
x= linspace(0,4);
subplot(2,1,1);
sr = subs(s,x) ;
plot(x,sr);
axis([0 4 -4 4]);
subplot(2,1,2);
s1= diff(s);
s1r = subs(s1,x) ;
plot(x,s1r)
YOu need not to use syms actually.
x= linspace(0,4);
s= sin(pi*x);
subplot(2,1,1);
plot(x,s);
axis([0 4 -4 4]);
subplot(2,1,2);
s1= gradient(s);
plot(x,s1)
answered Nov 16 '18 at 7:01
Siva Srinivas KolukulaSiva Srinivas Kolukula
1,1351613
You have to substitute the value of x in the sym objects s and s1 using subs. After that it will be converted to double and then you can plot them.
syms x;
s= sin(pi*x);
x= linspace(0,4);
subplot(2,1,1);
sr = subs(s,x) ;
plot(x,sr);
axis([0 4 -4 4]);
subplot(2,1,2);
s1= diff(s);
s1r = subs(s1,x) ;
plot(x,s1r)
YOu need not to use syms actually.
x= linspace(0,4);
s= sin(pi*x);
subplot(2,1,1);
plot(x,s);
axis([0 4 -4 4]);
subplot(2,1,2);
s1= gradient(s);
plot(x,s1)
answered Nov 16 '18 at 7:01
Siva Srinivas KolukulaSiva Srinivas Kolukula
1,1351613
edited Nov 16 '18 at 8:38
answered Nov 16 '18 at 7:01
Siva Srinivas KolukulaSiva Srinivas Kolukula
1,1351613
answered Nov 16 '18 at 7:01
Siva Srinivas KolukulaSiva Srinivas Kolukula
1,1351613
answered Nov 16 '18 at 7:01
Siva Srinivas KolukulaSiva Srinivas Kolukula
1,1351613
1,1351613
1
xis never used in OP's code.
– Mad Physicist
Nov 16 '18 at 7:04
If that was the case, code would crash at the first plot attempt, not the second one
– Brice
Nov 16 '18 at 8:33
add a comment |
1
xis never used in OP's code.
– Mad Physicist
Nov 16 '18 at 7:04
If that was the case, code would crash at the first plot attempt, not the second one
– Brice
Nov 16 '18 at 8:33
1
1
x is never used in OP's code.– Mad Physicist
Nov 16 '18 at 7:04
x is never used in OP's code.– Mad Physicist
Nov 16 '18 at 7:04
If that was the case, code would crash at the first plot attempt, not the second one
– Brice
Nov 16 '18 at 8:33
If that was the case, code would crash at the first plot attempt, not the second one
– Brice
Nov 16 '18 at 8:33
add a comment |
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5
Hi, you should read the documentation of
diff:If x is a vector of length m, then y=diff(x) returns a vector of length m-1. One possible solution for your problem would be:s1=[0 s1]– Irreducible
Nov 16 '18 at 6:31
The symbolic variable
xis never used andx1is defined out of order. Please provide a Rundle example.– Mad Physicist
Nov 16 '18 at 7:04
@Irreductible, this is actually the answer to the question, you should post it as an answer
– Brice
Nov 16 '18 at 8:34