Create a table from symbolic vectors

2015 6 26
4 个回答
更新时间：2018 6 25
4 次查看（30 天）

0 个投票

I would like to create a table from symbolic data. I have a vector where each component is a polynomial. I would like to have a table whose entries are these polynomials. When I use table command this happens
>> syms x1 x2 x3 x4 x5 x6
>> G=[x1, x2, x3, x4, x5, x6]
G =
[ x1, x2, x3, x4, x5, x6]
>> table(G)
ans =
G
_________
[1x6 sym]
>>

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回答（4 个）

Brendan Hamm
Brendan Hamm 2015-6-26

0 个投票

The table(var1, var2,...) function will create a table where the variables are the inputs var1, var2, ...
What you want is to have a table where each element (or column) is a variable, so use array2table:
T = array2table(G)

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Farid Salazar Wong
Farid Salazar Wong 2015-6-26
It is not working for me. Now I obtain
syms x1 x2 x3 x4 x5 x6
G=[x1, x2, x3, x4, x5, x6]
G =
[ x1, x2, x3, x4, x5, x6]
>> T=array2table(G)
T =
G1 G2 G3 G4 G5 G6
_________ _________ _________ _________ _________ _________
[1x1 sym] [1x1 sym] [1x1 sym] [1x1 sym] [1x1 sym] [1x1 sym]
Brendan Hamm
Brendan Hamm 2015-6-26
It is being stored that way, just not displayed that way:
>> T.G1
ans =
x1

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Azzi Abdelmalek
Azzi Abdelmalek 2015-6-26
编辑：Azzi Abdelmalek 2015-6-26

0 个投票

G=sym('x',[1,6])
H=num2cell(G)
table(H{:})

4 个评论
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Farid Salazar Wong
Farid Salazar Wong 2015-6-26
Does not work yet,
syms x1 x2 x3 x4 x5 x6
G=[x1, x2, x3, x4, x5, x6];
H=num2cell(G);
table(H{:})
ans =
Var1 Var2 Var3 Var4 Var5 Var6
_________ _________ _________ _________ _________ _________
[1x1 sym] [1x1 sym] [1x1 sym] [1x1 sym] [1x1 sym] [1x1 sym]
Azzi Abdelmalek
Azzi Abdelmalek 2015-6-26
What are you expecting as result?
Farid Salazar Wong
Farid Salazar Wong 2015-6-26
I would expect to have a table like this:
Var1 Var2 Var3 Var4 Var5 Var6
_________ _________ _________ _________ _________ _________
x1 x2 x3 x4 x5 x6
Walter Roberson
Walter Roberson 2015-6-26
This is a limitation on the display of tables. If you need to see the content of the columns you will need to do the formatting yourself. The table is properly formed, it just isn't displaying as you hope.

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Peter Perkins
Peter Perkins 2015-7-6

0 个投票

Farid, tables are meant to store "column-oriented heterogeneous data". That's not what you have, or at least not in your example. You have one symbolic variable, a 1x6 row vector. There's not much point in creating a 1x6 table, it just doesn't get you anywhere that your G variable doesn't already.
What are you really trying to achieve?
Seyed Morteza Raziee
编辑：Walter Roberson 2018-6-22

0 个投票

x = sym('x', [6, 2]);
y = string(x);
table(y(:,1), y(:,2), 'VariableNames', {'first_column', 'second_column'})

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