MATLAB: Error while plotting 3 vectors- Data must be numeric, date time, duration or an array convertible to double.

plot3

rohit=readtable('rahul11.xlsx')

t = rohit(:,1);

x = rohit(:,2);

u = rohit(:,3);

plot3(t,x,u)

%t,x,u are vectors of size 1*242

Best Answer

t = rohit(:, 1);
x = rohit(:,2);
u = rohit(:,3);

t, x, u are of type table and table datatypes do not have plot method.

Instead you can do

t = rohit.(1);
x = rohit.(2);
u = rohit.(3);
plot3(t, x, u)

Hope this solves your problem.

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MATLAB: Error using “plot” : Data must be numeric, datetime, duration or an array convertible to double?

Apparently, the error is that subplot attempts to plot a transfer function step response without evaluating it.

Try this instead:

[y,t] = step(sys);
T = (U0+D).*Gp;
[y1,t1] = step(T);
subplot(4,1,3);
plot(t1,y1,'linewidth',2);
grid
title('T(s)')
[y,t] = step(sys);
[y2,t2] = step(T.*H);
subplot(4,1,4);
plot(t2,y2,'linewidth',2);
grid
title('Tm(s)')

That ran without error.

You need to determine if it does what you want.

MATLAB: Values within a cell array must be numeric, logical, or char

Looking backwards,

out={PPM}

so out is a 1 x 1 cell array whose first and only element is the array PPM

PPM{i}={out1 out2 out3 out4 out5}

so PPM is a 1 x 3 cell array, and each cell in PPM is to contain a 1 x 5 cell array

    out1=num2cell(i);
    out2={num2cell(elems(1,1)) num2cell(elems(1,2))};
    out3=num2cell(L(i,1));
    out4=num2cell(A(i,1));
    out5=num2cell(E(i,1));

the first, third, fourth, and fifth of which are to be cell arrays containing scalars, and the second of which is to be a 1 x 2 cell array inside of each of which is a cell array containing a scalar

If I analyze correctly, out is

{{{{scalar} {{scalar} {scalar}} {scalar} {scalar} {scalar}} {{{scalar} {{scalar} {scalar}} {scalar} {scalar} {scalar}} {{{scalar} {{scalar} {scalar}} {scalar} {scalar} {scalar}}}}

This is not something that can be represented in a uitable.

The data property for a uitable can be:

a numeric array
a logical array
a character vector
a cell array, each entry of which is a numeric scalar, a logical scalar, or a character vector

It is never possible to for the data property to have a cell inside a cell.

You have a particular problem with out2: in uitable, it is not possible for a single column to store multiple values (except in that character vectors are, in one sense, multiple values).

I think you need to go for 6 columns.

It looks to me as if you could construct a simple numeric output.

I notice that your out2 does not subscript with i. In the below I presume that was a mistake, that you want different outputs for the out2

idx = 1 : 3;
PPM = [idx.', elems(idx,1:2), L(idx,1), A(idx,1), E(idx,1)];
set(handles.uitable1,'Data', PPM);

This code replaces all of the looping and all of the {} construction. All of your data appears to be numeric so there is no need to break it up into individual cells. (I cannot actually tell that for sure, though: it is not impossible that some of your data is character vector)

Best Answer

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MATLAB: Error using “plot” : Data must be numeric, datetime, duration or an array convertible to double?

MATLAB: Values within a cell array must be numeric, logical, or char

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