Mahdi
University of Waterloo
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MATLAB Enthusiast. Chemical Engineering Student; interested in computation and modelling. Enjoys Snowboarding.
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提问
How can I make this code more efficient?
Hello, Because of the large number of differential equations I'm trying to solve, I would like to make this code more efficie...
8 years 前 | 1 个回答 | 0
1
个回答已回答
X and Y matrix of size:1x68.this code works well.but when command " plot(X,Y,'ro', x,y,'-b',xt,yt,'--g');" shifted outside for loop; plot for last value of xt and yt How to store all values of xt and yt outside for loop?
Change the the lines to: xt(i,:) = X0+(0.1*(max(X)-min(X))*[-1 0 1]); and yt(i,:) = y(k) + m(k)*(0.1*(max(X)-min(...
X and Y matrix of size:1x68.this code works well.but when command " plot(X,Y,'ro', x,y,'-b',xt,yt,'--g');" shifted outside for loop; plot for last value of xt and yt How to store all values of xt and yt outside for loop?
Change the the lines to: xt(i,:) = X0+(0.1*(max(X)-min(X))*[-1 0 1]); and yt(i,:) = y(k) + m(k)*(0.1*(max(X)-min(...
10 years 前 | 0
已回答
Cubic spline interpolation with second derivative at ends as zero
Doesn't the <http://www.mathworks.com/help/matlab/ref/spline.html spline> function work?
Cubic spline interpolation with second derivative at ends as zero
Doesn't the <http://www.mathworks.com/help/matlab/ref/spline.html spline> function work?
10 years 前 | 0
已回答
i want some links to basic matlab problem solving
The <http://www.mathworks.com/matlabcentral/cody/?s_tid=gn_mlc_cody cody> problems give some quick practice.
i want some links to basic matlab problem solving
The <http://www.mathworks.com/matlabcentral/cody/?s_tid=gn_mlc_cody cody> problems give some quick practice.
10 years 前 | 0
| 已接受
已回答
How i save the value of c in deach loop and sum these value after each value then using value in another eq outside loop??
Say E=3; for i=1:3 A(i)=x((i-1)*3+1); B(i)=x((i-1)*3+2); C(i)=x((i-1)*3+3); Z(i)=A*B+C*A; W=E-sum(C); end
How i save the value of c in deach loop and sum these value after each value then using value in another eq outside loop??
Say E=3; for i=1:3 A(i)=x((i-1)*3+1); B(i)=x((i-1)*3+2); C(i)=x((i-1)*3+3); Z(i)=A*B+C*A; W=E-sum(C); end
10 years 前 | 0
已回答
How do I stack many files together into one?
One way of doing this name='SpectraA' for i=1:5 #Let's say you have SpectraA1....SpectraA5 Filename=strcat(name, num2str(...
How do I stack many files together into one?
One way of doing this name='SpectraA' for i=1:5 #Let's say you have SpectraA1....SpectraA5 Filename=strcat(name, num2str(...
10 years 前 | 0
已回答
matlab exe file to run as admin
Do you have the shortcut? You can right click --> Properties --> Location and find it. Even there, you can right click the short...
matlab exe file to run as admin
Do you have the shortcut? You can right click --> Properties --> Location and find it. Even there, you can right click the short...
10 years 前 | 0
已回答
what's the program mistake?
Try this? clear all clc; syms x A=[x 2 1;1 0 -x;5 1 x]; b=det(A) r=eval(solve(b==0))
what's the program mistake?
Try this? clear all clc; syms x A=[x 2 1;1 0 -x;5 1 x]; b=det(A) r=eval(solve(b==0))
10 years 前 | 0
已回答
How to make loop and sum the result ??
for i=1:3 A(i)=x((i-1)*3+1); B(i)=x((i-1)*3+2); C(i)=x((i-1)*3+3); R(i)=A^2+B^3+A*c; end Summation=sum(C);
How to make loop and sum the result ??
for i=1:3 A(i)=x((i-1)*3+1); B(i)=x((i-1)*3+2); C(i)=x((i-1)*3+3); R(i)=A^2+B^3+A*c; end Summation=sum(C);
10 years 前 | 0
| 已接受
已回答
Vector indexing inefficiency question.
Have you looked at <http://www.mathworks.com/help/matlab/ref/perms.html perms> built-in function? I'm sure you can manipulate to...
Vector indexing inefficiency question.
Have you looked at <http://www.mathworks.com/help/matlab/ref/perms.html perms> built-in function? I'm sure you can manipulate to...
10 years 前 | 0
| 已接受
已回答
I face the error of "In an assignment A(I) = B, the number of elements in B and I must be the same" when i want to create a loop a matrix. my simple short code given below, plz help me?
p(i) is one element, but you are trying to tell it to store multiple values, one of the following would fix your problem (Just r...
I face the error of "In an assignment A(I) = B, the number of elements in B and I must be the same" when i want to create a loop a matrix. my simple short code given below, plz help me?
p(i) is one element, but you are trying to tell it to store multiple values, one of the following would fix your problem (Just r...
10 years 前 | 0
| 已接受
已回答
Extract a row of multiple files in loop
I didn't look through the whole code, but based on the error, try the following: line(i) =line(i)+Signal(pixel_line,:); ...
Extract a row of multiple files in loop
I didn't look through the whole code, but based on the error, try the following: line(i) =line(i)+Signal(pixel_line,:); ...
10 years 前 | 0
| 已接受
已回答
Reading specific Cell in Excel
Have you looked at the <http://www.mathworks.com/help/matlab/ref/xlsread.html xlsread> documentation? It tells you exactly how t...
Reading specific Cell in Excel
Have you looked at the <http://www.mathworks.com/help/matlab/ref/xlsread.html xlsread> documentation? It tells you exactly how t...
10 years 前 | 1
已回答
Extract xdata and ydata from hggroup
If you have the .fig file, you can just follow this <http://www.mathworks.com/matlabcentral/answers/100687-how-do-i-extract-data...
Extract xdata and ydata from hggroup
If you have the .fig file, you can just follow this <http://www.mathworks.com/matlabcentral/answers/100687-how-do-i-extract-data...
10 years 前 | 0
已回答
How to make a vector where each element=5 and 100 elements long?
What you did produces a vector that starts at 1 and goes up by 5 till it reaches 100 elements. If that was your goal, then it's ...
How to make a vector where each element=5 and 100 elements long?
What you did produces a vector that starts at 1 and goes up by 5 till it reaches 100 elements. If that was your goal, then it's ...
10 years 前 | 0
提问
Why is 10^5 more expensive than 10e5?
As Jan mentioned in this <http://www.mathworks.com/matlabcentral/answers/57638#comment_119764 post>, what's the reason behind it...
10 years 前 | 1 个回答 | 1
1
个回答已回答
i need to fix errors in interface
This line: filename('waad s.jpg') is not a valid code to put into MATLAB. I am not sure what you're trying to do, but th...
i need to fix errors in interface
This line: filename('waad s.jpg') is not a valid code to put into MATLAB. I am not sure what you're trying to do, but th...
10 years 前 | 0
已回答
change the number of digits after decimal point
You can use the <http://www.mathworks.com/help/matlab/ref/sprintf.html sprintf> or the <http://www.mathworks.com/help/matlab/ref...
change the number of digits after decimal point
You can use the <http://www.mathworks.com/help/matlab/ref/sprintf.html sprintf> or the <http://www.mathworks.com/help/matlab/ref...
10 years 前 | 1
| 已接受
已回答
plot multipe figures with diferents color
You can iterate through each point with a for loop ColoursToUse=['r' 'b' 'g' 'c'] figure(1) hold on for i=1:4 plot3(mx(...
plot multipe figures with diferents color
You can iterate through each point with a for loop ColoursToUse=['r' 'b' 'g' 'c'] figure(1) hold on for i=1:4 plot3(mx(...
10 years 前 | 0
已回答
how can I direct a user to the script end script skipping intermediate?
You can easily just add an if statement for the code to only apply based on what you input into it. For example, let's say I hav...
how can I direct a user to the script end script skipping intermediate?
You can easily just add an if statement for the code to only apply based on what you input into it. For example, let's say I hav...
10 years 前 | 0
已回答
Generation of random numbers
I think what you're trying to do is done using randn, so that dd=(10^(4) - 10^(-4)).*randn(1000,1) + 10^(-4) hist(dd,100...
Generation of random numbers
I think what you're trying to do is done using randn, so that dd=(10^(4) - 10^(-4)).*randn(1000,1) + 10^(-4) hist(dd,100...
10 years 前 | 0
| 已接受
已回答
what 's different between axis square and axis equal in matlab ?
From this <http://www.mathworks.com/help/matlab/ref/axis.html page>: axis equal sets the aspect ratio so that the data units ...
what 's different between axis square and axis equal in matlab ?
From this <http://www.mathworks.com/help/matlab/ref/axis.html page>: axis equal sets the aspect ratio so that the data units ...
10 years 前 | 3
| 已接受
已回答
I want to make a function with save option.
The problem is in the way you're handling the variables. Basically, the inputs to your function in this case are taken as variab...
I want to make a function with save option.
The problem is in the way you're handling the variables. Basically, the inputs to your function in this case are taken as variab...
10 years 前 | 0
| 已接受
已回答
How to use legend command
Is the loop still telling the figure to plot even if there isn't any data recorded? You have a few ways around it: The first...
How to use legend command
Is the loop still telling the figure to plot even if there isn't any data recorded? You have a few ways around it: The first...
10 years 前 | 0
| 已接受
已回答
How to plot multiple iterations on the same axes?
figure; hold on for i=1:length(s_x_index) f_value(i)=f_x # This is the value that you get from each iteration end plot(s_x...
How to plot multiple iterations on the same axes?
figure; hold on for i=1:length(s_x_index) f_value(i)=f_x # This is the value that you get from each iteration end plot(s_x...
10 years 前 | 0
已回答
Convert a Roman numeral to its decimal equivalent for first ten roman numerals?
Have a look at this <http://www.mathworks.com/matlabcentral/fileexchange/26161-roman2num-and-num2roman--modern-roman-numerals fu...
Convert a Roman numeral to its decimal equivalent for first ten roman numerals?
Have a look at this <http://www.mathworks.com/matlabcentral/fileexchange/26161-roman2num-and-num2roman--modern-roman-numerals fu...
10 years 前 | 0
已回答
How May I import date/time from Excel?
Have you looked at this <http://www.mathworks.com/matlabcentral/newsreader/view_thread/284903 solution>?
How May I import date/time from Excel?
Have you looked at this <http://www.mathworks.com/matlabcentral/newsreader/view_thread/284903 solution>?
10 years 前 | 0
已回答
How come i get different output answers with the same matlab version, the same code installed on two different computers?
I am assuming that your problem is ill-conditioned or is very sensitive and depends greatly on the numbers from each step (or th...
How come i get different output answers with the same matlab version, the same code installed on two different computers?
I am assuming that your problem is ill-conditioned or is very sensitive and depends greatly on the numbers from each step (or th...
10 years 前 | 0
| 已接受
已回答
how to change matrix dimensions?
Based on what you told me, let's say that the data for the years 1984-2009 is stored in matrix A, you would simply do: B=A(...
how to change matrix dimensions?
Based on what you told me, let's say that the data for the years 1984-2009 is stored in matrix A, you would simply do: B=A(...
10 years 前 | 0
| 已接受
已回答
How to get image from axes in GUI matlab
After knowing which axes handle the image is loaded into, you can simple use the <http://www.mathworks.com/help/images/ref/getim...
How to get image from axes in GUI matlab
After knowing which axes handle the image is loaded into, you can simple use the <http://www.mathworks.com/help/images/ref/getim...
10 years 前 | 1
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