input_data = rand (1000,3); % randomly generated 1000 samples, each with x, Y, z three properties Figure (1);% control the drawing window to 1Hold off;% so that the current axis and graphics no longer have the nature of being refreshed, close on this basis and then drawPLOT3 (Input_data (:, 1), Input_data (:, 2), Input_data (:, 3), ' Ro '); Percent Function PCA, Input_data, Out_dim % use this to switch methodsuse_svd_method=1;% changed to 0 after using the
EXERCISE:PCA and WhiteningNo. 0 Step: Data preparationUFLDL The downloaded file contains the dataset Images_raw, which is a 512*512*10 matrix, which is 10 images of 512*512(a) data-loadingUsing the Sampleimagesraw function, extract the numpatches image blocks from the Images_raw, each image block size is patchsize, and the extracted image blocks are stored in columns, respectively, in each column of the matrix patches, That is, patches (:, i) holds all the pixel values of the first image block(b
If you haven't done anything for a long time, nothing can be updated. As we started to do things in the past two days, problems are constantly emerging, and even the use of standard complex classes has problems. Let's talk about the problem first.
xxxx.cpp: In member function ‘void xxxx::xxxxxxxx()’:xxxx.cpp:100: error: ISO C++ forbids declaration of ‘type name’ with no typexxxx.cpp:100: error: expected primary-expression before ‘double’xxxx.cpp:100: error: expected ‘;’ before ‘double’make: ***
sample, rowvar is set to 0. CovMat is the covariance matrix.
(3) Calculate the feature value and Feature Matrix call the eig function in linalg of the linear algebra module in numpy. The feature value and feature vector can be obtained directly from covMat:
eigVals,eigVects=np.linalg.eig(np.mat(covMat))
EigVals stores feature values and row vectors. EigVects stores feature vectors. Each column carries a feature vector. Feature values correspond to f
by Eig function.The elements of the D diagonal are the eigenvalues (representing the scale of the scaling), and D is that each column of the q,v in the eigenvalue decomposition formula corresponds to the D column, representing the corresponding eigenvector, the σ in the eigenvalue decomposition.1. Decomposition MethodFeature decomposition of matricesso that a is a square of nxn , and there are n linearly independent eigenvectors。this way, a can
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Save and close the file::wq!
Enable your virtual host file with a sym link to the sites-enabled directory:sudo ln-s/etc/httpd/sites-available/coolexample . com. conf/etc/httpd/sites-enabled/coolexample.com. conf
Restart Apache:sudo Service httpd Restart
Point your domain name to your serverIf your domain name isn ' t currently loading another website, you should point it to your server to test your new config.How do I depends on where your domain name is registered and wh
GoDaddy Domain name Replacement DNS
In many domain name registrars, the use of GoDaddy domain name registrars or mostly. Whether or not the majority of people today support the credit card payment, but its ordinary domain name preferential price is also relatively cheap, is within the acceptable range. We buy the domain name, need to use is the domain name resolution to the website host, many novice in the
accordance with the law to identify the site involved in yellow and illegal, to cooperate with the stop domain name resolution, while the domain name holder of all other domain names suspended resolution, timely report to the Department to deal with, and the domain name holders into the blacklist to be supervised.
5, focus on cleaning up the domain name registration and management agencies, domain name registration service agencies in the business promotion channels business partners, cooperat
Because of the well-known reasons, Aleng blog has to give up ***.cn domain name to migrate space content to godaddy,3 month 28th, I enabled the previous registration of the ***.net domain name, the data migration to the list of GoDaddy to join the ranks of the blog, due to a number of complex reasons, I only do the home page of the 301 redirect, redirect to ***.net, now has 10 days elapsed, I put this 10 da
Owned registrars MELBOURNE IT, LTD. d/b/a INTERNET NAMES WorldwideDNS server YNS1. Yahoo.comDNS server YNS2. Yahoo.comRegistration date 2008-6-30Expiration Date 2013-6-30Buy the address for everyone, here to buy, support Alipay!Yahoo domain name cannot be transferred, can be turned out, and no obstacles. No more charges, you can be assured to register.From Yahoo! Domains's help information found that Yahoo! Domains is a proxy for the domain registrar Melbourne IT (old internet Names worldwide) t
Which editor is better for php files? what is php files? php is short for HypertextPreprocessor, an embedded html language that is executed on the server... which editor is better for PHP files?
What is php?
Php is short for Hypertext Preprocessor, an embedded html language. it is a scripting language that is executed on the server to control html, its programming usage is similar to that of C language machines. currently and in the future are the most popular website programming languages.
.aspmx.l.google.com.@ 3600 in mx 30 aspmx2.googlemail.com.@ 3600 in mx 30 aspmx3.googlemail.com.@ 3600 in mx 30 aspmx4.googlemail.com.@ 3600 in mx 30 aspmx5.googlemail.com.;@ 3600 in txt "v = spf1 a include: aspmx.googlemail.com-all"After editing, run:
# Named-checkzone tommyang.org db.tommyang.org to check for syntax errors. Then restart BIND:
#/Etc/init. d/named restart if there is no problem, the server should be able to provide the query service normally now. Runable:
# Dig @ localhost tommy
I forgot why I switched the space on Godaddy from IIS6 to iis7, but I didn't feel any improvement at the time. Recently I found that iis7 supports php5.x, most of the excellent CMS systems are built with PHP, so the idea of replacing the current website with CMS emerged.
CMS is short for content management system.ArticleImages, sounds, and videos can all be content. Naturally, any system that can manage these things can be called a content managemen
Today is going to buy a domain name, but accidentally purchased a year of domain name trading member Services.
Originally I have a discount code in GoDaddy, You can use a 6.95 dollar price to buy a domain name (the normal price is 8.95 dollars), but today I am going to buy a new domain name, found that the discount code expired, is disappointed, but accidentally found that there is another one of GoDaddy n
Grammar
[Y1,y2,...] = Feval (fhandle,x1,x2,..., xn)
[y1,y2,...] = feval (fname,x1,x2,..., xn)
Describe
The first use of Fhandle is a function of the handle,x1,x2,... xn is the function of the parameters, the function of handle how to write, look at the following exampleThe fname in the second usage is a string representation of the function name. Note that the name must be a simple name, it cannot contain a path, and it cannot contain an. m extension. X1,x2,... xn is an example of this functi
In the job need to find the eigenvalues and eigenvectors of a matrix, of course, the students will use the MATLAB built-in functions [V, D] = Eig (A), so that the diagonal matrix D is a small-to-large arrangement of the characteristics of the value. Some students want to be able to separate this diagonal element into a row vector or column vector, but also hope that the characteristics of the value from large to small arrangement, in order to achieve
laplas% of the normalized value is the K minimum eigenvalues and corresponding eigenvectors function [eig_val,special_vector] = Get_special_vector (laplas,k) Eig_con = Eig (Laplas); [Vector,x] = Eig (Laplas); [Sort_vec,index] = sort (Eig_con, ' descend '); eig_val = Eig_con (Index (1:K)); temp_vector = vector (:, index (1:K)); [Row,col] = size (temp_vector), y = zeros (Row,col), for i=1:row s = (sum (te
the symbol. Example 8. returns the transpose x = B 'x = 8 3 4 1 5 9 6 7 2 linear algebra of matrix B. in MATLAB, the Inverse Calculation of the matrix only requires the function "inv", which greatly simplifies the calculation process. Example 9. calculate the inverse x = inv (a) x = 3-3 1-3 5-21-2 1 of matrix A in MATLAB, and obtain the size of the determining factor of the matrix, it can be implemented using the "det" function. Example 10. Obtain the determinant x = det (a) x = 1 of matrix A.
operations can be implemented using the following code:The% stress vector is required for the line vector T = (t * n). '; % if n is a column vector T = n * t; % if n is the line vector%, the positive stress sigma = N. ' * T * n; % if n is the column vector sigma = n * T * n. '; % if n is the row vector% of the shear stress tau = sqrt (norm (t) ^2-sigma^2); The main stress and its corresponding direction [V, D] = Eig (t);It doesn't seem to
Capitalize each letter in S into lowercase, lowercase to uppercase, and other characters. The return value is the modified string-(NSString *) reversalupperandlowerforstring: (NSString *) s{Nsmutablestring *str=[[nsmutablestring Alloc]init];for (int i=0; iNSString *substr=[s Substringwithrange:nsmakerange (i, 1)];Unichar J=[substr characteratindex:0];if ((j>= ' a ') (j[Str appendString: [SubStr uppercasestring];}else if ((j>= ' A ') (j{[Str appendString: [SubStr lowercasestring];}Else{[Str APP
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