Having trouble creating a table

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

Answer 1

[Ollie A]

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!

[Ollie A]

Or you could use the two variables you've already got knew and Tnew.

[Garrett Purvis]

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.

[Ollie A]

I think you need to clear your table each time you run the code.

Try including:

TA = [];

before you create the table. This should reset the variable TA.

Alternatively you could use:

clear all;

at the beginning of your code to clear all variables.

[Walter Roberson]

Is it possible that you accidentally assigned a value to a variable named table ? What does

which table

show ?

[Garrett Purvis]

oh! the

clear all

at the begining worked! thank you!

[Peter Perkins]

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