'summary' function for a cell

2020 12 19
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更新时间：2020 12 23
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summary function provides a summary of a content of a table
https://www.mathworks.com/help/matlab/ref/table.summary.html
Then what is a function to summarize the information of a cell?

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madhan ravi
madhan ravi 2020-12-19
Ran in:

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Ran in:
help cell2table
CELL2TABLE Convert cell array to table. T = CELL2TABLE(C) converts the M-by-N cell array C to an M-by-N table T. CELL2TABLE vertically concatenates the contents of the cells in each column of C to create each variable in T, with one exception: if a column of C contains character vectors, then the corresponding variable in T is a cell array of character vectors. T = CELL2TABLE(C, 'PARAM1', VAL1, 'PARAM2', VAL2, ...) specifies optional parameter name/value pairs that determine how the data in C are converted. 'VariableNames' A string array or cell array of character vectors containing variable names for T. The names must be valid MATLAB identifiers, and must be unique. 'RowNames' A string array or cell array of character vectors containing row names for T. The names need not be valid MATLAB identifiers, but must be unique. See also TABLE2CELL, ARRAY2TABLE, STRUCT2TABLE, TABLE. Documentation for cell2table doc cell2table

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alpedhuez
alpedhuez 2020-12-19
Yes but looking for information for the cell so that one can use this information to manipulate the cell later
Image Analyst
Image Analyst 2020-12-19
I don't believe there is such a function, and anyway, you don't need one to manipulate the cell array later. What you do need is knowledge of what you placed into each cell. And try to avoid cell arrays if you can. Use numerical arrays, tables, or structure arrays if you can, rather than a cell array.
alpedhuez
alpedhuez 2020-12-19
I would say there should be such one that will help people to visualize what they are doing.
alpedhuez
alpedhuez 2020-12-20
"Cell arrays contain data in cells that you access by numeric indexing. Common applications of cell arrays include storing separate pieces of text and storing heterogeneous data from spreadsheets."
I have data for cities and put a data for each city in a cell. Will structural array work better in this kind of situation?
Steven Lord
Steven Lord 2020-12-20
If you feel there should be a function similar in functionality to summary but for cell arrays, I recommend you send this enhancement request to Technical Support using the Contact Support link on the Support section of the MathWorks website. Please include in your enhancement request what aspects of the summary for table and timetable arrays you would find useful in a cell version, as well as sharing information about how you would plan to use it if it existed.
Farshid R
Farshid R 2020-12-22
Hi
Good time
I wrote this code but it gives an error
Please help me
thank you
n=100;
u1=[0,0]';
X1=[-4,-2,0]';
% p=data.PredictionHorizon;
a=0.9;h=0.9;
cp1=1;cp2=1;cp3=1;
% c1=0;c2=0;c3=0;
for j=1:n
c1(j)=(1-(1+a)/j)*cp1;
c2(j)=(1-(1+a)/j)*cp2;
c3(j)=(1-(1+a)/j)*cp3;
cp1=c1(j); cp2=c2(j); cp3=c3(j);
end
% initial conditions setting:
v1(1)=u1(1);
w1(1)=u1(2);
x1(1)=X1(1); y1(1)=X1(2); z1(1)=X1(3);
% calculation of phase portraits /numerical solution/:
for i=2:n
x1(i)=h*cos(z1(i-1))*v1(i-1) - memo(x1, c1, i);
y1(i)=h*sin(z1(i-1))*v1(i-1)-memo(y1, c2, i);
z1(i)=h*w1(i-1)-memo(z1, c3, i) ;
end
%%
function [yo] = memo(r, c, k)
%
temp = 0;
for j=1:k-1
temp = temp + c(j)*r(k-j);
end
yo = temp;
%
%%%%% error
Index exceeds the number of array elements (1).
Error in exocstrstateFcnCT1 (line 28)
x1(i)=h*cos(z1(i-1))*v1(i-1) - memo(x1, c1, i);
Walter Roberson
Walter Roberson 2020-12-23
You only initialize v1(1) so you have a problem when i = 3 because then you need v1(3-1) -> v1(2)

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