why is my code ignoring my while loop

In two cases, the code is ignoring what i put in a while loop and will just run whatever is after it. It will not run what is asked inside the loop.

example 1:

c1 = table2array(cm);
q = quantile(c1, [0.1 0.9])

k1 = table2array(kg);
q2 = quantile(k1, [0.12 0.88]) %decided due to looking at data by eye and determining which were the obvious outliers

figure
hold on
xlim([145 200])
ylim([50 135])
%check outliers
while cm{1:end, 'Fun_height'} < (q(2)) & cm{1:end, 'Fun_height'} > (q(1)) %where an outlier is a value that is less/greater than the 10th/90th quantile
   if kg{1:end, 'Fun_weight'} < (q2(2)) & kg{1:end, 'Fun_weight'} > (q2(1)) %where an outlier is a value that is less/greater than the 15th/85th quantile
        scatter(cm{1:end, 'Fun_height'}, kg{1:end, 'Fun_weight'},'ro') 
   end
end
scatter(cm{1:end, 'Fun_height'}, kg{1:end, 'Fun_weight'},'ro')
grid on
ylabel('weight')
xlabel('height')
hold off

here, it just plots data from the scatter after the the while loop, ignoring everything inside the loop.

example 2 :

n = input('value of n')
%input user value for n
x = input('value of x')
%input user value for x
y = input('value of y')
%input user value for y

k = 1

 while k< n && k>=1
     k = k + 1;
        seriessum = @(n,x,y) sum((x./y).^k);     
 end
seriessum = @(n,x,y) sum((x./y).^k);
s = seriessum(n,x,y);


figure
 plot(k,s, 'ro')

Here, it just plots the value as if k =1, ignoring the while loop again.

[ME]

It's hard to give a proper answer here since we don't have access to the cm and kg data.

My guess though is that your while loop never does anything because the conditions listed are never met. If you could upload your data to this question then I'll happily take a look and see if I can figure out a slightly more specific answer.

[kavita mudan]

There is a lot of data so i will just show you the begining of it

    kg =
        Fun_weight
    __________

      118.04  
       83.99  
       77.18  
       79.45  
      76.272  
      453.09  
      78.088  
       77.18  
      66.738  
      67.192  
       63.56  
       77.18  
       59.02  
       93.07  
       83.99  
       63.56  
       70.37  
       59.02  
       72.64  
       59.02  
       74.91  
      131.66  
       56.75  
      452.18  
       79.45  
       47.67  
      64.468  
       72.64  
       97.61  
       72.64  
       59.02  
       93.07  
       83.99  
      102.15  
      94.886  
      106.69  
       63.56  
      102.15  
       81.72  
      62.652  
        90.8  
      106.69  
       77.18  
       97.61  
       61.29  
       56.75  
       65.83  
       77.18  
       93.07  
       52.21  
       79.45  
        68.1  
       81.72  
       54.48  
      452.18  
       65.83  
      87.168  
       72.64  
       59.02  
       63.56  
       77.18  
      108.96  
       99.88  
       49.94  
       79.45  
       79.45  
      71.732  
       81.72  
      53.572  
      87.622  
      85.806  
       59.02  
       74.91  
       54.48  
       63.56  
       65.83  
        90.8  
       59.02  
      78.996  
      91.708  
       77.18  
        68.1  
       86.26  
        90.8  
      60.836  
       61.29  
      452.18  

and cm =

          Fun_height
    __________

      187.96  
       177.8  
      154.94  
      172.72  
      167.64  
      248.92  
      251.46  
       177.8  
       165.1  
      162.56  
       165.1  
      167.64  
      251.46  
      154.94  
      154.94  
       165.1  
      172.72  
      162.56  
      162.56  
      167.64  
      170.18  
      182.88  
      154.94  
      243.84  
       165.1  
      154.94  
      167.64  
      162.56  
      182.88  
      162.56  
      162.56  
      180.34  
      162.56  
      182.88  
       177.8  
      167.64  
      187.96  
      193.04  
      172.72  
      167.64  
      167.64  
      175.26  
      154.94  
      162.56  
      167.64  
      175.26  
      167.64  
      180.34  
      180.34  
      160.02  
      172.72  
       190.5  
      162.56  
      157.48  
      243.84  
       165.1  
      162.56  
       152.4  
      157.48  
      154.94  
      160.02  
      182.88  
      182.88  
      160.02  
      170.18  
       165.1  
      162.56  
      154.94  
      167.64  
       165.1  
      172.72  
      162.56  
      180.34  
       165.1  
      160.02  
      162.56  
      182.88  
       165.1  
      180.34  
      182.88  
      162.56  
       165.1  
      182.88  
      175.26  
      167.64  
      162.56  
      243.84  

I have checked and the conditions should only contain non-zero values.

Thanks so much for taking a look

Answer 1

[Rik]

You shouldn't use logical arrays as your conditional. It will never do what you think it does. This is what it does:

IF=@(cond) ~isempty(cond) && all(cond(:));

For the second example: it does run all the code. It just overwrites the result on every iteration, just as the mlint is warning you. During the plotting you are using k (which is a scalar) and s (which has the same size as x and y for a scalar k).

[kavita mudan]

Thanks, I have figured this part out and it was just that the data was being overwritten