I need my array to hit zero before starting next iteration

Question

Noah Varner 2022-11-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1866793-i-need-my-array-to-hit-zero-before-starting-next-iteration

评论： David Hill 2022-11-29

I am working on this code, I am no expert at all in MATLAB. I would like for cases1 to reach zero before moving on to the next "diff_counts", but it will instead start over and never reach zero. How do I make this hapopen? any help is appreciated.

here is what the first values of cases1 look like incase I did not explain well.

diff_counts=[20 40 60 80 100];
cases1=zeros(1,10080);
starts1=sort(randi(10080,1000,1),'ascend');
for j=1:1000
    start1(j)=starts1(j,1);
cases1(1,start1(j))=randsample(diff_counts,1);
x1=cases1(1,start1(j))/42.25;
for i=start1(j):10080
    cases1(1,i+1)=cases1(1,i)-x1;
    if cases1(1,i)<=0
        cases1(1,i)=0;
    end
end
end

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Answer 1

David Hill 2022-11-29

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https://ww2.mathworks.cn/matlabcentral/answers/1866793-i-need-my-array-to-hit-zero-before-starting-next-iteration#answer_1115543

在 MATLAB Online 中打开

Not sure if I completely understood your question, but break will break out of the for-loop.

diff_counts=[20 40 60 80 100];
cases1=zeros(1,10080);
starts1=sort(randi(10080,1000,1),'ascend');
for j=1:1000
  cases1(starts1(j))=randsample(diff_counts,1);
  x1=cases1(starts1(j))/42.25;
  for i=starts1(j):10080
    cases1(i+1)=cases1(i)-x1;
    if cases1(i)<=0
        cases1(i)=0;
        break;
    end
  end
end

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Noah Varner 2022-11-29

Im aware of what break does, dont think that solves my problem though. I need the value of cases1 to be zero before the script goes to the next "starts1"

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Answer 2

David Hill 2022-11-29

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1866793-i-need-my-array-to-hit-zero-before-starting-next-iteration#answer_1115568

在 MATLAB Online 中打开

diff_counts=[20 40 60 80 100];
cases1=zeros(1,10080);
starts1=sort(randi(10080,1000,1),'ascend');
for j=1:1000
  cases1(starts1(j))=randsample(diff_counts,1);
  x1=cases1(starts1(j))/42.25;
  i=starts1(j);
  while cases1(i)>0
    cases1(i+1)=cases1(i)-x1;
    i=i+1;
  end
  cases1(i)=0;
end
cases1
cases1 = 1×10121
         0  100.0000   20.0000   19.5266   19.0533   18.5799   18.1065   17.6331   80.0000   78.1065   76.2130   74.3195   72.4260   70.5325   60.0000   58.5799   57.1598   55.7396   54.3195   52.8994   51.4793   50.0592   48.6391   47.2189   45.7988   44.3787   42.9586   41.5385   40.1183   20.0000

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David Hill 2022-11-29

在 MATLAB Online 中打开

d_counts=[20 40 60 80 100];
for k=1:numel(d_counts)
    cases(k,:)=[d_counts(k):-d_counts(k)/42.25:0,0];%this generates the 5 cases
end
%it does not matter what the start time is, the case is just going to be
%one of the five cases randomly selected.
s_cases=cases(randi(5,1,1000),:)
s_cases = 1000×44
   60.0000   58.5799   57.1598   55.7396   54.3195   52.8994   51.4793   50.0592   48.6391   47.2189   45.7988   44.3787   42.9586   41.5385   40.1183   38.6982   37.2781   35.8580   34.4379   33.0178   31.5976   30.1775   28.7574   27.3373   25.9172   24.4970   23.0769   21.6568   20.2367   18.8166
   20.0000   19.5266   19.0533   18.5799   18.1065   17.6331   17.1598   16.6864   16.2130   15.7396   15.2663   14.7929   14.3195   13.8462   13.3728   12.8994   12.4260   11.9527   11.4793   11.0059   10.5325   10.0592    9.5858    9.1124    8.6391    8.1657    7.6923    7.2189    6.7456    6.2722
   40.0000   39.0533   38.1065   37.1598   36.2130   35.2663   34.3195   33.3728   32.4260   31.4793   30.5325   29.5858   28.6391   27.6923   26.7456   25.7988   24.8521   23.9053   22.9586   22.0118   21.0651   20.1183   19.1716   18.2249   17.2781   16.3314   15.3846   14.4379   13.4911   12.5444
   60.0000   58.5799   57.1598   55.7396   54.3195   52.8994   51.4793   50.0592   48.6391   47.2189   45.7988   44.3787   42.9586   41.5385   40.1183   38.6982   37.2781   35.8580   34.4379   33.0178   31.5976   30.1775   28.7574   27.3373   25.9172   24.4970   23.0769   21.6568   20.2367   18.8166
   60.0000   58.5799   57.1598   55.7396   54.3195   52.8994   51.4793   50.0592   48.6391   47.2189   45.7988   44.3787   42.9586   41.5385   40.1183   38.6982   37.2781   35.8580   34.4379   33.0178   31.5976   30.1775   28.7574   27.3373   25.9172   24.4970   23.0769   21.6568   20.2367   18.8166
   20.0000   19.5266   19.0533   18.5799   18.1065   17.6331   17.1598   16.6864   16.2130   15.7396   15.2663   14.7929   14.3195   13.8462   13.3728   12.8994   12.4260   11.9527   11.4793   11.0059   10.5325   10.0592    9.5858    9.1124    8.6391    8.1657    7.6923    7.2189    6.7456    6.2722
   80.0000   78.1065   76.2130   74.3195   72.4260   70.5325   68.6391   66.7456   64.8521   62.9586   61.0651   59.1716   57.2781   55.3846   53.4911   51.5976   49.7041   47.8107   45.9172   44.0237   42.1302   40.2367   38.3432   36.4497   34.5562   32.6627   30.7692   28.8757   26.9822   25.0888
   80.0000   78.1065   76.2130   74.3195   72.4260   70.5325   68.6391   66.7456   64.8521   62.9586   61.0651   59.1716   57.2781   55.3846   53.4911   51.5976   49.7041   47.8107   45.9172   44.0237   42.1302   40.2367   38.3432   36.4497   34.5562   32.6627   30.7692   28.8757   26.9822   25.0888
   60.0000   58.5799   57.1598   55.7396   54.3195   52.8994   51.4793   50.0592   48.6391   47.2189   45.7988   44.3787   42.9586   41.5385   40.1183   38.6982   37.2781   35.8580   34.4379   33.0178   31.5976   30.1775   28.7574   27.3373   25.9172   24.4970   23.0769   21.6568   20.2367   18.8166
   80.0000   78.1065   76.2130   74.3195   72.4260   70.5325   68.6391   66.7456   64.8521   62.9586   61.0651   59.1716   57.2781   55.3846   53.4911   51.5976   49.7041   47.8107   45.9172   44.0237   42.1302   40.2367   38.3432   36.4497   34.5562   32.6627   30.7692   28.8757   26.9822   25.0888

Noah Varner 2022-11-29

for my application i need a random start time

David Hill 2022-11-29

在 MATLAB Online 中打开

d_counts=[20 40 60 80 100];
for k=1:numel(d_counts)
    cases(k,:)=[d_counts(k):-d_counts(k)/42.25:0,0];%this generates the 5 cases
end
starts1=sort(randi(10080,1000,1));
s_cases=cases(mod(starts1,5)+1,:)
s_cases = 1000×44
  100.0000   97.6331   95.2663   92.8994   90.5325   88.1657   85.7988   83.4320   81.0651   78.6982   76.3314   73.9645   71.5976   69.2308   66.8639   64.4970   62.1302   59.7633   57.3964   55.0296   52.6627   50.2959   47.9290   45.5621   43.1953   40.8284   38.4615   36.0947   33.7278   31.3609
   80.0000   78.1065   76.2130   74.3195   72.4260   70.5325   68.6391   66.7456   64.8521   62.9586   61.0651   59.1716   57.2781   55.3846   53.4911   51.5976   49.7041   47.8107   45.9172   44.0237   42.1302   40.2367   38.3432   36.4497   34.5562   32.6627   30.7692   28.8757   26.9822   25.0888
   60.0000   58.5799   57.1598   55.7396   54.3195   52.8994   51.4793   50.0592   48.6391   47.2189   45.7988   44.3787   42.9586   41.5385   40.1183   38.6982   37.2781   35.8580   34.4379   33.0178   31.5976   30.1775   28.7574   27.3373   25.9172   24.4970   23.0769   21.6568   20.2367   18.8166
   20.0000   19.5266   19.0533   18.5799   18.1065   17.6331   17.1598   16.6864   16.2130   15.7396   15.2663   14.7929   14.3195   13.8462   13.3728   12.8994   12.4260   11.9527   11.4793   11.0059   10.5325   10.0592    9.5858    9.1124    8.6391    8.1657    7.6923    7.2189    6.7456    6.2722
  100.0000   97.6331   95.2663   92.8994   90.5325   88.1657   85.7988   83.4320   81.0651   78.6982   76.3314   73.9645   71.5976   69.2308   66.8639   64.4970   62.1302   59.7633   57.3964   55.0296   52.6627   50.2959   47.9290   45.5621   43.1953   40.8284   38.4615   36.0947   33.7278   31.3609
   80.0000   78.1065   76.2130   74.3195   72.4260   70.5325   68.6391   66.7456   64.8521   62.9586   61.0651   59.1716   57.2781   55.3846   53.4911   51.5976   49.7041   47.8107   45.9172   44.0237   42.1302   40.2367   38.3432   36.4497   34.5562   32.6627   30.7692   28.8757   26.9822   25.0888
   60.0000   58.5799   57.1598   55.7396   54.3195   52.8994   51.4793   50.0592   48.6391   47.2189   45.7988   44.3787   42.9586   41.5385   40.1183   38.6982   37.2781   35.8580   34.4379   33.0178   31.5976   30.1775   28.7574   27.3373   25.9172   24.4970   23.0769   21.6568   20.2367   18.8166
   40.0000   39.0533   38.1065   37.1598   36.2130   35.2663   34.3195   33.3728   32.4260   31.4793   30.5325   29.5858   28.6391   27.6923   26.7456   25.7988   24.8521   23.9053   22.9586   22.0118   21.0651   20.1183   19.1716   18.2249   17.2781   16.3314   15.3846   14.4379   13.4911   12.5444
   80.0000   78.1065   76.2130   74.3195   72.4260   70.5325   68.6391   66.7456   64.8521   62.9586   61.0651   59.1716   57.2781   55.3846   53.4911   51.5976   49.7041   47.8107   45.9172   44.0237   42.1302   40.2367   38.3432   36.4497   34.5562   32.6627   30.7692   28.8757   26.9822   25.0888
   20.0000   19.5266   19.0533   18.5799   18.1065   17.6331   17.1598   16.6864   16.2130   15.7396   15.2663   14.7929   14.3195   13.8462   13.3728   12.8994   12.4260   11.9527   11.4793   11.0059   10.5325   10.0592    9.5858    9.1124    8.6391    8.1657    7.6923    7.2189    6.7456    6.2722

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I need my array to hit zero before starting next iteration

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I need my array to hit zero before starting next iteration

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