Maximum variable size allowed by the program is exceeded and some errors

Question

mahan farahani 2020-6-7

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/543869-maximum-variable-size-allowed-by-the-program-is-exceeded-and-some-errors

评论： Walter Roberson 2020-6-7

Hi Guys,

i want to write simple moving average in matlab by my code. i know there is and function for this reason but i need to write it. my first error is,Maximum variable size allowed by the program is exceeded . can someone fix it for me.

i have one function including SMA and one script.

Thank you in Advanced.

The SMA function is

function Simple_M=SMA(Buffer2,period,bar)
    sum1=zeros(1,period);
    for i=1:period
       
        sum1=sum1+Buffer2(bar-i);
       
    end
     Simple_M=sum1/period;
end

The Script is

clc;
clear;
close all;
close1=[11 34 82 22 43 26 98 73 81 21 55 39 76 15 45 68 39 28 11 28 44];
Period=7;
Buffer=zeros(1:20);
 for i=10:20
        Buffer(i)=SMA(close1(i),Period,i);
 end

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Answer 1

Steven Lord 2020-6-7

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https://ww2.mathworks.cn/matlabcentral/answers/543869-maximum-variable-size-allowed-by-the-program-is-exceeded-and-some-errors#answer_447605

在 MATLAB Online 中打开

Buffer=zeros(1:20);

You need to use a comma instead of a colon.

BufferComma=zeros(1,20);

BufferComma is a 1-by-20 vector. Buffer would be a 1-by-2-by-3-by-4-by-5-by-6-by-... -by-19-by-20 array. How much memory would Buffer require?

>> numberOfElements = prod(1:20);
>> bytes = 8*numberOfElements;
>> exabytes = bytes/1e18
exabytes =
          19.4632160654131

How much memory is that? According to the Wikipedia page for exabyte "The content of the Library of Congress is commonly estimated to hold 10 terabytes of data in all printed material. Recent estimates of the size including audio, video, and digital materials start at 3 petabytes[27] to 20 petabytes. Therefore, one exabyte could hold a hundred thousand times the printed material or 50 to 300 times all the content of the Library of Congress."

Your computer doesn't have that much memory, and even if it did numberOfElements is greater than the maximum number of elements allowed in a matrix in MATLAB as stated by the computer function.