How to create a matrix with several days using eval fuction?

First of all, sorry for my english.

for i=1:2
dia={eval(['day' num2str(i) '= i'])}
figure
pcolor(longitude(lon_useful),latitude(lat_useful),squeeze(temperatura(lon_useful,lat_useful,i))'),   
title (day{i})
shading flat
colorbar
daspect([1,1,1])
end

I have this code and everytime he runs I want to create a plot with the title "day 1" for the first time, "day 2" for the second and i want to creat a matrix that have "day i" for 'i' times in order to get easier and to change day={'day1','day2'} .

I hope you guys could help me.

Answer 1

[Steven Lord]

There's no need to use eval here, and in general if you feel you need to use eval that's often a code smell.

To assemble text using fixed strings and numbers there are several possibilities. In my order of preference:

• Create a string array.

n = 5;
d = "day " + n

You can even make several strings at once:

m = 1:5;
d2 = "day " + m
d2(3) % this is "day 3"

• Use num2str or sprintf.

d = ['day ' num2str(5)]
d2 = sprintf('day %d', 5)

[Tiago Martinho]

Thank you!!!

[Tiago Martinho]

Can you help me with something please??

Inside of this cicle for, but with the i=1:15, to create 15 figures of 15 differents days, I want to create a matrix of a profile, with the depth and the temperature for 5 different values of depth. How can I do that inside of this cicle? I tried to use other cicle for, but keeps giving me an error.