Create a double variable array

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James Upton 2019-7-21

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https://ww2.mathworks.cn/matlabcentral/answers/472671-create-a-double-variable-array

评论： Rik 2019-7-21

The following code wont work because: I have a date1 variable array which is a double and the P_D variable seems to be a cell array. I need to set P_D to be a double variable, all numbers in the P_D variable are doubles.

Error using plot
Invalid data argument.
Error in thethird (line 54)
plot(date1, P_D(:,1))  

CODE:

    P_D(i,1)={Premium};
    P_D(i,2)= {Call};
    P_D(i,3)= {Put};
   
end
date1 = datenum(date,'yyyy-mm-dd HH:MM:SS');
plot(date1, P_D(:,1)) 
datetick('x', 'mm-dd')

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Walter Roberson 2019-7-21

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Assign into a numeric array instead.

    P_D(i,1)=Premium;
    P_D(i,2)= Call;
    P_D(i,3)= Put;

Rik 2019-7-21

Judging from the use of cells in the first place, I would guess either of the other parameters are not scalar doubles. If they are scalar doubles, then there is no need to add the complexity of a cell array.

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