Automatic building of an array

Question

surendra kumar Aralapura mariyappa 2019-6-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/469345-automatic-building-of-an-array

评论： surendra kumar Aralapura mariyappa 2019-7-1

采纳的回答： Bob Thompson

在 MATLAB Online 中打开

Hey all,

Below is my function. I need to build the array automatically for the user input.

function suri1(Measuring_Data(:,7))
%User input
X = {1, 2,'Node1'; 3, 4, 'Node2'; 5, 6, 'Node3'};         % different for different users
n = 10;
d_T= 1 ;
t = 200;
S = load('Measuring_Data.mat');
f = 0:d_T:(t-1)*d_T;
p = cell2mat(X(:,1));
q = cell2mat(X(:,2));
disp(p);
disp(q);
T_Vorgabe = zeros(1,length(f));    % Row vector
for plotnumber = 1:n
    c = find(p == plotnumber,1);
    if ~isempty(c)
        c = plotnumber;
        for plotnumber1 = 1:n
            c1 = find(q == plotnumber1,1);
            if ~isempty(c1)
                c1 = plotnumber1;
                T_Vorgabe{c}(1,:) = S(c1,1);              % May be worng syntax , All the values of the measuring data should be copied to T_Vorgabe as a row %vector or row cell array, c is the user input number to build the vector or cell array of different names
           end
        end
    end
end
figure
hold('on')
for plotnumber2 = 1:n
c2 = find(p == plotnumber,1)
if     ~isempty(c2)
c2 = plotnumber;
plot(f(1:15:end)/200, T_Vorgabe{c2});               % Slover should plot all the values of T_Vorgabe(row vector or row cell array.
end
end
end

Here T_Vorgabe{c2} will be cell array. Now while plotting the T_Vorgabe solver should get the all the values stored from the respective cell arrayT_Vorgabe{c2}.

My questions are,

How to make T_Vorgabe as a row vector, or row cell array of different names according to user input?

Like below

T_Vorgabe{1}=[1,2,3,...,2920]

T_Vorgabe{2}=[2921,2922,2923,...,5840] etc

Any suggestions and answers are most welcomed.

Thanks in advance

6 个评论
显示 4更早的评论隐藏 4更早的评论

surendra kumar Aralapura mariyappa 2019-6-28

编辑：surendra kumar Aralapura mariyappa 2019-6-28

@Nbob ''Can you be more specific ''

T_Vorgabe{c}(1,:) = S(c1,1);

I just need to know whether it is correct or not!. Why because, currently I don't have measuring data with me. So I need to build it for the future use.

Let's be more specific.

I have a matrix S contains measuring data. So I need to copy the specific row of S into T_Vorgabe according to user input. For an example, If the user want to copy row 2 5 9 to T_Vorgabe, T_Vorgabe should be a row vector or row cell array of different names. Like below

T_Vorgabe{2}(1,:)

T_Vorgabe{5}(1,:)

T_Vorgabe{9}(1,:)

Here the problem is, Whether the code is correct or not! Both T_Vorgabe{c}(1,:) = S(c1,1); and T_Vorgabe{2}(1,:) .

Second question is How to access the indicies of element of cell array?

For an example.

X = {1, 2,'Node1'; 3, 4, 'Node2'; 5, 6, 'Node3'};

p = cell2mat(X(:,1));

Now I need to access the indicies of cell element of first column.

I hope my explanation is okay now to get the answer.

Thanks in advance.

surendra kumar Aralapura mariyappa 2019-7-1

@Stephen Cobeldick.

Now I realized the importance of your suggestion after I ran my program. It is taking too much time to do compilation. It is the time for me to make my code according to your suggestion.

Anyways thank you.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Bob Thompson 2019-6-28

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/469345-automatic-building-of-an-array#answer_381210

'T_Vorgabe{c}(1,:) = S(c1,1);

I just need to know whether it is correct or not!. '

As I mentioned before, the concept is sound, and it should produce something like what you are looking for. I cannot tell you if it is 'correct' because minor adjustments may be needed to personalize the code to your specific dataset. I suspect this line will not actually have to be changed, but perhaps your definition of c and c1 will need to be changed. That is something you will have to tackle though when you have an actual sample of data to work with. That's just how debugging works.

'Second question is How to access the indicies of element of cell array?'

For information on how to work with cell indices I recommend this link. If you still need additional help, please be more specific.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

surendra kumar Aralapura mariyappa 2019-6-29

@ Nbob, ' please be more specific.'

I think at least I will get the solution to my problem now.

%T1(:,1) = T1(:,1)+ 20; % Adding the ambient temperature

%f = 0:d_T:(t-1)*d_T; %d_T is step time

% Here d_T = 1 and t = 200 iterations. %T1 is a temperature vector for 200 iterations

load('Measuring_Data.mat');

[f,T] = Samplemodel_Instat('Measuring_Data.mat');

[Lambda, A, B, D,V,H, Rho,cP,P, M, A1,O, X, M_1] = Matrix_Samplemodel;

% X = { 3 6 'Node1': 4 9 'Node2'}; Like this

p = cell2mat(X(:,1));

q = cell2mat(X(:,2));

disp(p);

disp(q);

n = size(A,1);

T_Vorgabe = zeros(1,length(f)); % I am not sure whether the preallocation is correct or not!.

for plotnumber = 1:n

c = find(p == plotnumber,1);

if ~isempty(c)

c = plotnumber;

for plotnumber1 = 1:n

c1 = find(q == plotnumber1,1);

if ~isempty(c1)

c1 = plotnumber1;

T_Vorgabe{c}(1,:) = Measuring_Data(c1, 1); % Here Measuring_Data should be copied to %T_Vorgabe each time with new variable name according to the user input.

end

%then all the T_Vorgabe{c} should be plotted.

plot(f(1:200:end)/3600,T_Vorgabe{c}(1:200:end),'Color','k','LineWidth',2,'LineStyle','--');

end

I hope now it is understandable.

this is the error I am getting:

"Cell contents assignment to a non-cell array object.

Error in suri1 (line 22)

T_Vorgabe{c}(1,:) = Measuring_Data(c1, 1);"

I just need to copy the measuring values to new T_Vorgabe variable like T_Vorgabe.1, T_Vorgabe.2 each time and plot it.

Any suggestions and answered are most welcomed

Thanks in advance.

请先登录，再进行评论。

Automatic building of an array

6 个评论
显示 4更早的评论隐藏 4更早的评论

采纳的回答

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

更多回答（0 个）

另请参阅

类别

标签

产品

版本

Community Treasure Hunt

Automatic building of an array

6 个评论 显示 4更早的评论隐藏 4更早的评论

采纳的回答

1 个评论 显示 -1更早的评论隐藏 -1更早的评论

更多回答（0 个）

另请参阅

类别

标签

产品

版本

Community Treasure Hunt

6 个评论
显示 4更早的评论隐藏 4更早的评论

1 个评论
显示 -1更早的评论隐藏 -1更早的评论