Variable name in title

After loading in a data file, the following variables are assigned to the individual columns of the data file:

   pressure1=dataFile(:,1); 
   temperature1=dataFile(:,2); 
   humidity1=dataFile(:,3); 
   ...

If I plot all the columns using a for loop,

for i=1:47
   figure;
   Plot(dataFile(:,i))
   title
   saveas
   close
end

then what to write in the title line so that it automatically puts 'pressure1' as the title when i=1, 'temperature1' as the title when i=2, 'humidity1' as the title when i=3, and so on? Also, how to use the saveas command (or any other alternative) so that the figure gets saved in the variable names, i.e. pressure1.jpg, temperature1.jpg, humidity1.jpg etc.

[Stephen23]

Do not put meta-data into variable names. This is a bad practice that makes code complicated and buggy:

https://www.mathworks.com/matlabcentral/answers/225435-save-variable-as-string-from-user-input

https://www.mathworks.com/matlabcentral/answers/56124-eval-is-evil-using-variables-created-dynamically-info-retrieval#answer_67978

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

Learn from the experts: use indexing, and do not numbers in your variable names.

Answer 1

[Jan]

Althoug meaningful names of variables are a good programming practice, they should not carry information which is used for processing. The output of a program should be the same, if a variable is renamed. Then:

NameList = {'pressure1', 'temperature1', 'humidity1', ...}
for i=1:47
   figure;
   plot(dataFile(:, i))
   title(NameList{i})
end

[b]

How can the NameList be extracted from the already declared variables? All the columns of the data file have already been assigned the variable names.

[gowtham balu]

how do i use loops to find the min and max value within a specified range of values.

every 0.5 seconds there is a sample taken. 0 to 0.5s one max and min value ...so 0.5s= 1 cycle. totally 10000 cycles.

please see the attached text file with this comment

please help me....because i dont know how to use syntax in matlab

[Steven Lord]

This does not appear to be related to the original question. Ask it as a new question instead of as a comment on an answer for this existing question.

Answer 2

[KSSV]

for i=1:47
   figure;
   Plot(dataFile(:,i))
   str = strcat('pressure',num2str(i)) ;
   title(str)
   saveas(gcf,str,'jpg')
   close
end

[b]

No.