Error the input character is not valid in matlab statements or expressions перевод

Hi, i have an error when i try to run this t=-2:.1:5; x=3*exp(0.4*t); y=2*exp(-0.9*t); plot(t,x,t,y,':'); legend('x(t)','y(t)') i'm new to matlab, please help ASAP :( ps : i'm ...

Nugroho Permata Putra

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Hi, i have an error when i try to run this

t=-2:.1:5;

x=3*exp(0.4*t);

y=2*exp(-0.9*t);

plot(t,x,t,y,‘:’);

legend(‘x(t)’,‘y(t)’)

i’m new to matlab, please help ASAP :( ps : i’m using matlab r2012b

  6 Comments

Nugroho Permata Putra

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my friend use matlab r2013a and it works

Star Strider

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Please post you actual code, not an image of it.

Jan

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Nugroho Permata Putra

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Edited: Jan

on 2 Mar 2016

t=-2:.1:5;

x=3*exp(0.4*t);

y=2*exp(-0.9*t);

plot(t,x,t,y,‘:’);

legend(‘x(t)’,‘y(t)’)

Jan

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Edited: Jan

on 2 Mar 2016

And if you copy and paste this code in the command window, you get the same error?

Nugroho Permata Putra

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i got the solution, it was t={Character: ASCII Code 2}-2:.1:5; so i need to erase the special char. Sorry my apologies

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Jan

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Edited: Jan

on 2 Mar 2016

The error message seems to tell, that the equal character «=» is not valid. How strange. Perhaps it is the space behind the =, which is a backspace charcter ‘b’ ?!

The code looks okay. How did you insert it to the command window? Simply try to type it again.

What is in the line above? Perhaps a continuation ‘…’ and you’ve added the «>>» manually? I admit, this is wild guessing.

  1 Comment

Nugroho Permata Putra

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i just copy paste it from the ebook to matlab editor :D

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More Answers (2)

Kaya Wydler Cunningham

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The input character is not valid in MATLAB statements or expressions.

Error in lv (line 11)

[t,y] = ode45(@lvfun,[0 200],[1 1]); % solve ODE system over

Unsure as to what this means?

  2 Comments

Steven Lord

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One or more of the characters in that expression (or perhaps inside lvfun) should be underlined in red in the Editor. If it is, tell us which one it is; copy and paste it between the single quotes in the following command; and tell us what MATLAB displays when you execute that command.

My suspicion is that you copied and pasted the code from something (Microsoft Word® for instance) that tries to be «nice» with its formatting. [The most common culprit is the «smart quote».]

Jan

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@Kaya: Please do not post a new question in the section for answers, but open a new thread. Then post the complete error message. It seems like the most interesting part is missing.

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Ahmed Makhlas

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j’ai une erreur au niveau de la fonction imhist quelq’un qui aide moi

img=imread(‘lena1.png’);

subplot(1,2,1);

imshow(img)

img=rgb2gray(img);

subplot(1,2,2)

imhist(img) %???????????????????????????

Error: File: imhist.m Line: 1 Column: 1

The input character is not valid in MATLAB statements or expressions.

  1 Comment

Steven Lord

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First, I want to check whether you’re calling the imhist.m included in Image Processing Toolbox or you’re calling an imhist.m that you created or downloaded. What does this command display?

which -all imhist

/MATLAB/toolbox/images/images/imhist.m
/MATLAB/toolbox/images/images/@gpuArray/imhist.m % Shadowed gpuArray method

If you’re using the imhist function from Image Processing Toolbox, I want to check that you haven’t accidentally modified it. What does this command display?

dbtype 1:1 imhist.m

1 function [yout,x] = imhist(varargin)

Which release of Image Processing Toolbox are you using?

ver images

——————————————————————————————————
MATLAB Version: 9.9.0.1544872 (R2020b) Update 3
MATLAB License Number:
Operating System: Linux 4.14.195-0414195-generic #202008260539 SMP Wed Aug 26 11:20:58 UTC 2020 x86_64
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
——————————————————————————————————
Image Processing Toolbox Version 11.2 (R2020b)

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Nugroho Permata Putra

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 ⋮ 

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Hi, i have an error when i try to run this

t=-2:.1:5;

x=3*exp(0.4*t);

y=2*exp(-0.9*t);

plot(t,x,t,y,‘:’);

legend(‘x(t)’,‘y(t)’)

i’m new to matlab, please help ASAP :( ps : i’m using matlab r2012b

  6 Comments

Nugroho Permata Putra

Direct link to this comment

 ⋮ 

  • Link

    Direct link to this comment

my friend use matlab r2013a and it works

Star Strider

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 ⋮ 

  • Link

    Direct link to this comment

Please post you actual code, not an image of it.

Jan

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 ⋮ 

  • Link

    Direct link to this comment

Nugroho Permata Putra

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 ⋮ 

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Edited: Jan

on 2 Mar 2016

t=-2:.1:5;

x=3*exp(0.4*t);

y=2*exp(-0.9*t);

plot(t,x,t,y,‘:’);

legend(‘x(t)’,‘y(t)’)

Jan

Direct link to this comment

 ⋮ 

  • Link

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Edited: Jan

on 2 Mar 2016

And if you copy and paste this code in the command window, you get the same error?

Nugroho Permata Putra

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i got the solution, it was t={Character: ASCII Code 2}-2:.1:5; so i need to erase the special char. Sorry my apologies

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Accepted Answer

Jan

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 ⋮ 

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Edited: Jan

on 2 Mar 2016

The error message seems to tell, that the equal character «=» is not valid. How strange. Perhaps it is the space behind the =, which is a backspace charcter ‘b’ ?!

The code looks okay. How did you insert it to the command window? Simply try to type it again.

What is in the line above? Perhaps a continuation ‘…’ and you’ve added the «>>» manually? I admit, this is wild guessing.

  1 Comment

Nugroho Permata Putra

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i just copy paste it from the ebook to matlab editor :D

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More Answers (2)

Kaya Wydler Cunningham

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 ⋮ 

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The input character is not valid in MATLAB statements or expressions.

Error in lv (line 11)

[t,y] = ode45(@lvfun,[0 200],[1 1]); % solve ODE system over

Unsure as to what this means?

  2 Comments

Steven Lord

Direct link to this comment

 ⋮ 

  • Link

    Direct link to this comment

One or more of the characters in that expression (or perhaps inside lvfun) should be underlined in red in the Editor. If it is, tell us which one it is; copy and paste it between the single quotes in the following command; and tell us what MATLAB displays when you execute that command.

My suspicion is that you copied and pasted the code from something (Microsoft Word® for instance) that tries to be «nice» with its formatting. [The most common culprit is the «smart quote».]

Jan

Direct link to this comment

 ⋮ 

  • Link

    Direct link to this comment

@Kaya: Please do not post a new question in the section for answers, but open a new thread. Then post the complete error message. It seems like the most interesting part is missing.

Sign in to comment.

Ahmed Makhlas

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 ⋮ 

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j’ai une erreur au niveau de la fonction imhist quelq’un qui aide moi

img=imread(‘lena1.png’);

subplot(1,2,1);

imshow(img)

img=rgb2gray(img);

subplot(1,2,2)

imhist(img) %???????????????????????????

Error: File: imhist.m Line: 1 Column: 1

The input character is not valid in MATLAB statements or expressions.

  1 Comment

Steven Lord

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 ⋮ 

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First, I want to check whether you’re calling the imhist.m included in Image Processing Toolbox or you’re calling an imhist.m that you created or downloaded. What does this command display?

which -all imhist

/MATLAB/toolbox/images/images/imhist.m
/MATLAB/toolbox/images/images/@gpuArray/imhist.m % Shadowed gpuArray method

If you’re using the imhist function from Image Processing Toolbox, I want to check that you haven’t accidentally modified it. What does this command display?

dbtype 1:1 imhist.m

1 function [yout,x] = imhist(varargin)

Which release of Image Processing Toolbox are you using?

ver images

——————————————————————————————————
MATLAB Version: 9.9.0.1544872 (R2020b) Update 3
MATLAB License Number:
Operating System: Linux 4.14.195-0414195-generic #202008260539 SMP Wed Aug 26 11:20:58 UTC 2020 x86_64
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
——————————————————————————————————
Image Processing Toolbox Version 11.2 (R2020b)

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Nugroho Permata Putra

  • Direct link to this question

 ⋮ 

  • Direct link to this question

Hi, i have an error when i try to run this

t=-2:.1:5;

x=3*exp(0.4*t);

y=2*exp(-0.9*t);

plot(t,x,t,y,‘:’);

legend(‘x(t)’,‘y(t)’)

i’m new to matlab, please help ASAP :( ps : i’m using matlab r2012b

  6 Comments

Nugroho Permata Putra

Direct link to this comment

 ⋮ 

  • Link

    Direct link to this comment

my friend use matlab r2013a and it works

Star Strider

Direct link to this comment

 ⋮ 

  • Link

    Direct link to this comment

Please post you actual code, not an image of it.

Jan

Direct link to this comment

 ⋮ 

  • Link

    Direct link to this comment

Nugroho Permata Putra

Direct link to this comment

 ⋮ 

  • Link

    Direct link to this comment

Edited: Jan

on 2 Mar 2016

t=-2:.1:5;

x=3*exp(0.4*t);

y=2*exp(-0.9*t);

plot(t,x,t,y,‘:’);

legend(‘x(t)’,‘y(t)’)

Jan

Direct link to this comment

 ⋮ 

  • Link

    Direct link to this comment

Edited: Jan

on 2 Mar 2016

And if you copy and paste this code in the command window, you get the same error?

Nugroho Permata Putra

Direct link to this comment

 ⋮ 

  • Link

    Direct link to this comment

i got the solution, it was t={Character: ASCII Code 2}-2:.1:5; so i need to erase the special char. Sorry my apologies

Sign in to comment.

Accepted Answer

Jan

  • Direct link to this answer

 ⋮ 

  • Direct link to this answer

Edited: Jan

on 2 Mar 2016

The error message seems to tell, that the equal character «=» is not valid. How strange. Perhaps it is the space behind the =, which is a backspace charcter ‘b’ ?!

The code looks okay. How did you insert it to the command window? Simply try to type it again.

What is in the line above? Perhaps a continuation ‘…’ and you’ve added the «>>» manually? I admit, this is wild guessing.

  1 Comment

Nugroho Permata Putra

Direct link to this comment

 ⋮ 

  • Link

    Direct link to this comment

i just copy paste it from the ebook to matlab editor :D

Sign in to comment.


More Answers (2)

Kaya Wydler Cunningham

  • Direct link to this answer

 ⋮ 

  • Direct link to this answer

The input character is not valid in MATLAB statements or expressions.

Error in lv (line 11)

[t,y] = ode45(@lvfun,[0 200],[1 1]); % solve ODE system over

Unsure as to what this means?

  2 Comments

Steven Lord

Direct link to this comment

 ⋮ 

  • Link

    Direct link to this comment

One or more of the characters in that expression (or perhaps inside lvfun) should be underlined in red in the Editor. If it is, tell us which one it is; copy and paste it between the single quotes in the following command; and tell us what MATLAB displays when you execute that command.

My suspicion is that you copied and pasted the code from something (Microsoft Word® for instance) that tries to be «nice» with its formatting. [The most common culprit is the «smart quote».]

Jan

Direct link to this comment

 ⋮ 

  • Link

    Direct link to this comment

@Kaya: Please do not post a new question in the section for answers, but open a new thread. Then post the complete error message. It seems like the most interesting part is missing.

Sign in to comment.

Ahmed Makhlas

  • Direct link to this answer

 ⋮ 

  • Direct link to this answer

j’ai une erreur au niveau de la fonction imhist quelq’un qui aide moi

img=imread(‘lena1.png’);

subplot(1,2,1);

imshow(img)

img=rgb2gray(img);

subplot(1,2,2)

imhist(img) %???????????????????????????

Error: File: imhist.m Line: 1 Column: 1

The input character is not valid in MATLAB statements or expressions.

  1 Comment

Steven Lord

Direct link to this comment

 ⋮ 

  • Link

    Direct link to this comment

First, I want to check whether you’re calling the imhist.m included in Image Processing Toolbox or you’re calling an imhist.m that you created or downloaded. What does this command display?

which -all imhist

/MATLAB/toolbox/images/images/imhist.m
/MATLAB/toolbox/images/images/@gpuArray/imhist.m % Shadowed gpuArray method

If you’re using the imhist function from Image Processing Toolbox, I want to check that you haven’t accidentally modified it. What does this command display?

dbtype 1:1 imhist.m

1 function [yout,x] = imhist(varargin)

Which release of Image Processing Toolbox are you using?

ver images

——————————————————————————————————
MATLAB Version: 9.9.0.1544872 (R2020b) Update 3
MATLAB License Number:
Operating System: Linux 4.14.195-0414195-generic #202008260539 SMP Wed Aug 26 11:20:58 UTC 2020 x86_64
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
——————————————————————————————————
Image Processing Toolbox Version 11.2 (R2020b)

Sign in to comment.

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