In an assignment A(I) = B, the number of elements in B and I must be the same.

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Bradley 2014-3-23

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评论： Joseph Cheng 2014-3-23

采纳的回答： Walter Roberson

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Hello, I'm getting the following error:

* ***COMMAND WINDOW***** * *In an assignment A(I) = B, the number of elements in B and I must be the same.

Error in C_B_HW_9 (line 22) Comfort(count)=('cold');

* *This is the script <file:*> * *

for count=1:1:20
    C(count) = -50+200*rand(1);
    K(count) = C(count)+273.15;
    F(count) = C(count)*9/5+32; %converting celsius to fahrenheit
    R(count) = C(count)*1.8+491.67;
    if F(count)>32
        if F(count)>55
            if F(count)>70
                if F(count)>90
                    if F(count)>105
                        Comfort(count)=('!!!');
                    else
                    Comfort(count)=('hot');
                    end
                else
                Comfort(count)=('warm');
                end
            else
            Comfort(count)=('mild');
            end
        else
        Comfort(count)=('cold');
        end
    else
    Comfort(count)=('freeze');
    end
end
for count=1:20
    fprintf('\n %.0f   %.0f    %.1f    %.2f    %.1f    %s\n', count,C(count), K(count), F(count), R(count), Comfort(count));
end

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Answer 1

Walter Roberson 2014-3-23

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编辑：Walter Roberson 2014-3-23

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strings are vectors of characters, not indivisible units. If your string is 4 characters long then you need to store it into 4 locations.

You may wish to consider using cell arrays.

Comfort{count} = 'mild';

notice the {} instead of (). Same goes when you want to retrieve, Comfort{count}

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Answer 2

Joseph Cheng 2014-3-23

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each of your "Comfort(count)= something" is trying to stuff the string that has 3+ elements into a single array index. Perhaps if you use the {} instead of () to make these cells. example: Comfort{count}='!!!'; This will allow different length strings to be in Comfort for each iteration of count.

however at the bottom in the fprintf you may need to use "cell2mat(Comfort(count))"

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Joseph Cheng 2014-3-23

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the elseif will also compact your nested if statements

if Temp>105
    Comfort{i}= '!!!'
elseif Temp>90
    Comfort{i} = 'hot'
elseif Temp>70 
    Comfort{i} = 'warm'
elseif Temp>50 
    Comfort{i} = 'mild'
else
    Comfort{i} = 'cold'
end