c# - Calculating RMS with overlapping windows -

-

I have a 1-dimensional float array, each computed with a single window length. Now say that 

  RMS = {0, 0.01, 0.4, ...}

Now the RMS for a larger window, Can be shown in the range of the original windows, as RMS of "participating" RMS from RMS [i] to RMS [i + len] May be. Here is the length of the big window divided by the length of the lane original window.

I want to create a rolling window. I want 

  RMS from RMS [0] = 0 to lane ... rollingRMS [n] = lms to n + ln + n

As calculated as efficiently as possible, I know that cracking is not very difficult, but has anyone prepared the code prepared for it?

Edit: I asked the sample code, so I think it would be nice to provide something below based on the answer to Pierce and written in C #. This is slightly different from my original question because I realized that it would be good to be similar to the original size of the resulting array and to be the window end on each element.

// RMS data to be analyzed float [] RMS = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; // Resulting Rolling RMS Value Float [] RollingRMS = New Float [RMS.Long]; // window length int len ​​= 3; // Calculate: RollingRMS RMS array will mean each class from the root which will be / on each related sample. Input // for the first lane specimens will be treated as zero-pad (int i = 0; i & lt; RMS.Length; i ++) {if (i == 0) rolling RMS [i] = (Float) monastery scurr (RMS [i] * RMS [ii] / lane)); Other if rolling RMS [i] = (Float) Math SRT (RMS) * RMS [I] + Lane * (Rolling RMS [I-1] Rolling RMS [I-1]) / Lane; RMS RMS [I-1] * RMS [I] * RMS [I] - RMS [I-LAN] * RMS (Rolling RMS [I-1] * RMS [I] [I-LAN]) / LAN); }

I'm not sure that I've understood your problem correctly Give me a try 

  a = [1,2,3,4,5,6,7,8,9,10] LAN = 3 squarefolding rms [0] = (A [0] ^ 2 + A [2] ^ 2 + A [2] ^ 2) / lan square offrolling rms [1] = (a [1] ^ 2 + a [2] ^ 2 + a [3] ^ 2) / lan   
  square offrolling rms [i] = rolling rms [i-1] * lan - a [ii]] ^ 2 + a [i + lan -1] ^ 2 rollingRMS [ii] = squafofofrollingRMS [i] ^ (1/2)  
 
 Do this in this way, you are avoiding the overlap window to avoid it again. 
 
 Edit: 
 
 You can save some division and multiplication handle by moving  LEN  to the left side of the equations. It can move too much because usually splitting is relatively slow. 
 
  LEN_by_SquareOfRollingRMS [0] = (a [0] ^ 2 + a [1] ^ 2 + a [2] ^ 2) LEN_by_SquareOfRollingRMS [i] = LEN_by_RollingRMS [i-1] - One [I-1] ^ 2 + one [i + lan-1] ^ 2

Comments

Post a Comment

Popular posts from this blog

MySql variables and php -

-
I am getting an error with php in order to format mysql_query () in php to format this string What is the right way? SELECT SELECT SELECT (*) Agents @AgentCount; User_Agent_English, User_Angent_Oursal, US.___Gent_Aginal, COUNT (User_Agent_Percade) ACC, COUNT (*) / (AgentCount) Percentage by agents user_agent_preser order DEC limit limit 50; In PHP, how am i setting $ query $ query = "SELECT count (*) agents @ agentcount; SELECT user_agent_parsed, User_agent_original , COUNT (user_agent_parsed) ascount, COUNT (*) / (@AgentCount) as a percentage by user_agent_parced by URI date DESC limit 50 "; This exact query will work properly if I put it in MySQL directly through a command line session. Do I need to release two separate php calls from mysql_query () and store the results first? I get the following error: There is an error in your SQL syntax; Instead of using a sub-selection and instead of using the 'SELECT user_agent_parsed, user_agent_original, ne...
Read more

url rewriting - How to implement the returnurl like SO in PHP? -

-
This URL should work even after the rewrite. Is this possible? Otherwise, I can only hardcoded everything If you are trying to create a login system with redirection You need to use the HTTP_REFERER header to find out where the user came from so that you can send it back there. The best way to do this is to use something like this in your login form: // - Login php & Lt; Input type = "password" name = "password" /> & Lt; Input type = "hidden" name = "returnrelale" value = "& lt ;? php echo $ redirectURL ;? & gt;" / & Gt; & Lt; / Form & gt; Please note that some ISP, browser or proxy will delete the referrer header, so you can not rely on each user to work fully. If you use a statement, to check whether the header exists or not, you can send those users back to the homepage or whatever. Edit If you are looking to use $ _SERVER ['REQUEST_URI'], if you are running Apache It sho...
Read more

Which Python client library should I use for CouchdB? -

-
I am starting to experiment with CouchDB because it looks like we have the right solution to certain problems That all the work will be on a new project, which does not have any legacy dependency, which the client library will suggest you use, and why? If we overlap any of the OS. Freeband is available only in the collection of its ports, but asks to use the library's project website. None of those people are Ubuntu, which is only with ships, since those two OSAs are not common in libraries, I am probably installing something from source (and hopefully if I have time, then Ubuntu and FreeBSD People pack the package). For those interests, I want to use CouchDB as a convenient intermediate storage space for data passed between different services - think of a message bus system, but less formalities with. For example, we have daemons that download and pars the web page, then send an interesting bit to other daemons for further processing. Many of them are ill-defined until the...
Read more