Having trouble creating a table

Question

Garrett Purvis 2019-1-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/442363-having-trouble-creating-a-table

评论： Peter Perkins 2019-1-31

I am trying to make a table of the variables T and K. both have 9 values so there should be no issue with them being different sizes.At first they were both 1 row and 9 columns, but that came up wtih a similar error. I tried reshaping them into vectors of 1 column and 9 rows, but that didnt help.

disp('   ') %putting in a space for readability
disp('Q = 8000 cal/mol') %displaying the given variables
disp('R = 1.987 cal/(mol*K)')
disp('ko = 1200 min^-1')
disp('T = 100K-500K')
disp('   ') %putting in a space for readability
disp('computing the reaction constant') %solving the problem
Q = 8000;
R = 1.987;
ko = 1200;
T = 100:50:500;
disp('Reaction constant (k) = ko*e^(-Q/(R*T))')
k = ko.*exp(-Q./(R.*T));
knew = reshape(k,9,1);
Tnew = reshape(T,9,1);
TA = table(T,k)   %error is in this line: Row index exceeds table dimentions

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Ollie A 2019-1-30

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/442363-having-trouble-creating-a-table#answer_358780

在 MATLAB Online 中打开

Make sure the variables you create your table with are column vectors. In this case I suspect your vectors are row vectors.

Just change this line and it should work:

TA = table(T',k');

Hope this helps!

6 个评论
显示 4更早的评论隐藏 4更早的评论

Garrett Purvis 2019-1-30

在 MATLAB Online 中打开

It still returned the same error for me when I changed the line to what you suggested. i also tired using the new variables, but that also did not work and i recieved the same error

First i tried this

Q = 8000;
R = 1.987;
ko = 1200;
T = 100:50:500
disp('Reaction constant (k) = ko*e^(-Q/(R*T))')
k = ko.*exp(-Q./(R.*T));
knew = reshape(k,9,1);
Tnew = reshape(T,9,1);
TA = table(T',k')

And this is the output i got in the command window:

Q = 8000 cal/mol

R = 1.987 cal/(mol*K)

ko = 1200 min^-1

T = 100K-500K

computing the reaction constant

T =

100 150 200 250 300 350 400 450 500

Reaction constant (k) = ko*e^(-Q/(R*T))

Error using hw02a_Purvis_Garrett (line 54)

Row index exceeds table dimensions.

Then i tried

Q = 8000;
R = 1.987;
ko = 1200;
T = 100:50:500
disp('Reaction constant (k) = ko*e^(-Q/(R*T))')
k = ko.*exp(-Q./(R.*T));
knew = reshape(k,9,1);
Tnew = reshape(T,9,1);
TA = table(Tnew,knew)

And the output to the command window was the same:

Q = 8000 cal/mol

R = 1.987 cal/(mol*K)

ko = 1200 min^-1

T = 100K-500K

computing the reaction constant

T =

100 150 200 250 300 350 400 450 500

Reaction constant (k) = ko*e^(-Q/(R*T))

Error using hw02a_Purvis_Garrett (line 54)

Row index exceeds table dimensions.

Garrett Purvis 2019-1-30

在 MATLAB Online 中打开

oh! the

clear all

at the begining worked! thank you!

Peter Perkins 2019-1-31

Walter is right: somewhere you created a variable named "table". That's the real issue.

请先登录，再进行评论。

Having trouble creating a table

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

回答（1 个）

6 个评论
显示 4更早的评论隐藏 4更早的评论

另请参阅

类别

标签

产品

版本

Community Treasure Hunt

Having trouble creating a table

0 个评论 显示 -2更早的评论隐藏 -2更早的评论

回答（1 个）

6 个评论 显示 4更早的评论隐藏 4更早的评论

另请参阅

类别

标签

产品

版本

Community Treasure Hunt

WeChat

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

6 个评论
显示 4更早的评论隐藏 4更早的评论