How can i correct the error in the code?
显示 更早的评论
if true
% q=[q(2*qk)(2*qk)(4*qk)]
end
I am getting the following error
()-indexing must appear last in an index expression.
in the editor its showing Cannot call or access into a temporary array.
how to correct the error
1 个评论
Image Analyst
2013-4-23
That will not give an error because it's commented out. Please post the actual code, and all of the actual error message - all the red text displayed in the command window.
回答（4 个）
per isakson
2013-4-23
What is your intension? I guess
q=[q(2*qk),(2*qk),(4*qk)]
6 个评论
Pooja
2013-4-23
Pooja
2013-4-23
per isakson
2013-4-23
Either there is a typo in the text book or there is actually space between the factors; space where I guessed comma, ",".
Pooja
2013-4-23
per isakson
2013-4-23
One can use either space or comma as delimiter. I prefer comma because is more visible.
Does the code of the text book run after you made the correction?
Pooja
2013-4-23
0 个投票
14 个评论
per isakson
2013-4-23
The Matlab function, imwrite, can output JPEG2000 files.
"... showing more errors ..." You might have introduced more typing errors. Obviously, I cannot guess.
Pooja
2013-4-23
per isakson
2013-4-23
The function, imwrite, includes "errorless" code!
Image Analyst
2013-4-23
编辑：Image Analyst
2013-4-23
Please don't make an answer to your question. You should keep posting comments to per, not Answers to yourself.
Repeating my comments from above: "That will not give an error because it's commented out. Please post the actual code, and all of the actual error message - all the red text displayed in the command window."
Walter Roberson
2013-4-23
I am not aware of any JPEG2000 source written in MATLAB; it is usually written in C or C++ and then called from MATLAB.
I have not seen the Gonzalvez textbook; which title is it? Gonzalvez usually makes a software library available for texts, usually on CD.
Pooja
2013-4-23
Image Analyst
2013-4-23
编辑：Image Analyst
2013-4-23
Is there some reason why you're not posting the actual red text error message by copying and pasting, like I've asked for before twice now?
Walter Roberson
2013-4-23
JPEG 2000 has a number of patent claims against it, with some of the claimants having given limited patent licenses and some of the claimants still not even having said anything other than "You are violating our patent". As best I can tell it is not possible to get a list of the licenses or the patent claims without purchasing the JPEG 2000 specification and by so doing agreeing to the "click-wrap" licenses.
In the organization I used to work for, it was absolutely completely forbidden to agree to license terms without having had an opportunity to read the license terms. A lot of other organizations have similar principles .
Because of these legal issues it is difficult for people to assist with anything to do with JPEG 2000.
Jan
2013-4-23
Usually Matlab does not show more errors, because it stops after the first one already. So I suggest to show us the errors or fix them by your own. Please note, that you did not even explain which code you are talking of.
And finally I'm sure, that there is no JPEG2000 tool available, because this format is copyrighted too restrictively.
Pooja
2013-4-23
per isakson
2013-4-23
That lengthy code, where does it come from? Is there reason to believe there is just a few minor problems?
Walter Roberson
2013-4-23
Experiment with replacing
[c,s]=wavefast(x,n,'jpeg9.7');
with
[c,s]=wavefast(x.',n,'jpeg9.7');
Image Analyst
2013-4-23
编辑：Image Analyst
2013-4-23
There is no C in the code you posted, nor is there a wavework(). Should I ask a fourth time for you to post ALL of your error text that appears in the command window in red (not just part of it like you did)? Nah, I think I'll just give up - besides, I don't have the Wavelet Toolbox anyway. If you want to post your code, check out this link: http://www.mathworks.com/matlabcentral/answers/7924-where-can-i-upload-images-and-files-for-use-on-matlab-answers
Pooja
2013-4-23
Md Muzakkir Quamar
2019-2-19
0 个投票
n=100;
lamda=0.1;
e=randn(n,1);
U12=[Sin(0.1*(1:n)') Sin((0.1+lamda)*(1:n)')]
Y=(Sin(0.1*(1:n)')+e;
R=U12'*U12;
r=U12'*Y;
thetahat=inv(R)*r;
>> learning
Error: File: learning.m Line: 8 Column: 21
Invalid expression. When calling a function or indexing a
variable, use parentheses. Otherwise, check for mismatched
delimiters.
can anyone answer whats the error
khalid khann
2021-1-12
0 个投票
A=-1.04963*10^11
B=8.44865*10^-8
u=1.47895*10^7
t=0.5
x=(-10^(2):100:10^2)
f=u/A.*sech (1./2*sqrt(u/B)*(x-u*t)).^2
plot(x,f)
it show this erro
Error in Untitled (line 7)
plot(x,f)
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