Trying to create two arrays called z and y

Question

Kelton McKee 2020-1-15

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/500331-trying-to-create-two-arrays-called-z-and-y

评论： Walter Roberson 2020-2-9

% create variable x with array of all necessary values
x=linspace(0.1,13,50);
 
for i=x
% create equation to determine y
y=(sqrt(2.*i)*4*i.^3)/(4.*i(1)+7.^(i/10));
%create equation to determine z
z=log10(2.*i+5)+(4.*i+exp(i))/(2./3+4.*i.^2);
end

For the code above im trying to use values from my x array to create two arrays, y and z, im pretty new to matlab and im struggling, thanks.

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Walter Roberson 2020-2-9

Copy of the question in case the user edits it away like they did other questions:

% create variable x with array of all necessary values
x=linspace(0.1,13,50);
 
for i=x
% create equation to determine y
y=(sqrt(2.*i)*4*i.^3)/(4.*i(1)+7.^(i/10));
%create equation to determine z
z=log10(2.*i+5)+(4.*i+exp(i))/(2./3+4.*i.^2);
end

For the code above im trying to use values from my x array to create two arrays, y and z, im pretty new to matlab and im struggling, thanks.

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Answer 1

Cameron B 2020-1-15

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https://ww2.mathworks.cn/matlabcentral/answers/500331-trying-to-create-two-arrays-called-z-and-y#answer_410179

编辑：Cameron B 2020-1-15

First I would rename the variable i as ii so it’s not confused with the more general use of i = sqrt(-1). To save the variable, you need to index them. You can either have them as one row full of data or one column. Because this looks like homework I don’t want to write it all out for you. But while you’re going through the for loop, you’ll need to save the variable to a new position each time so it doesn’t overwrite. I’ll give you an example.

    indx = 1; %starting value for array end
pp = 0:0.2:5;
for xx = pp
    y(indx,1)= xx^2; %y variable is saved in a different column position each time through the loop
    indx = indx + 1; %increment your value by one to save it to a new spot
end
disp(y) %displays your y variable in the command windiw
plot(pp,y) %plots your pp vs your y