Class Notes (839,065)
United States (325,751)
Chemistry (865)
CHEM 5 (21)
Lecture

02 List, Tables, Matrices, Plotting lists of data, Least-squares fitting, Importing data.pdf

10 Pages
133 Views

Department
Chemistry
Course Code
CHEM 5
Professor
Douglas Tobias

This preview shows pages 1,2 and half of page 3. Sign up to view the full 10 pages of the document.
Description
Lists and tables Lists of data arise in many circumstances, e.g., a series of measurements made as a function of time, etc. In Mathe- matica, a list is simply a collection of objects stored between brackets, and assigned to a name. The elements of a list can be whatever you want: In[262]:=tters = 8a, b, c, d< Out[262]=1319.77, b, c, d< In[263]:=tegers = 81, 2, 3< Out[263]=1, 2, 3< reals = 810.0, 44.7, 61.3, 76.5, 88.1< In[264]:= Out[264]=10., 44.7, 61.3, 76.5, 88.1< Lists can be generated using the Table command, which takes two arguments. The first is the expression to be evaluated, and the second gives the variable and the its range. Here are a few examples: In[265]:= create list of squares of i for i = 1 to i = 10 *L squares = [email protected]^2, 8i, 1, 10 3 5 7 9 In[268]:= note 1êi was not evaluated at i = 10 because stepsize was 2 *L H* here we do the same thing using a function that we define first: *L [email protected]_D := 1 ê x; recip = [email protected]@xD, 8x, 1, 10, 2 3 5 7 9 The Length command gives the length of a list: In[270]:[email protected] Out[270]=0 In[271]:[email protected] Out[271]= There are a number of commands for extracting particular elements from a list: In[272]:= First and last extract the first and last elements, respectively, from a list: *L [email protected] Out[272]=319.77 2 mathematica_lesson3.nb In[273]:[email protected] Out[273]= In[274]:= second and third element: *L [email protected]@2DD [email protected]@3DD Out[274]= Out[275]= In[276]:= second and third from last element *L [email protected]@-2DD [email protected]@-3DD Out[276]= b Out[277]= H* Make a new list using the first 3 elements using the Take command: *L In[278]:= [email protected], 3D Out[278]=1319.77, b, c< In[279]:= Make a new list using the last 3 elements using the Take command: *L In[280]:[email protected], -3D Out[280]=b, c, d< Arithmetic operations are distributive over lists: In[281]:=* integers Out[281]=2, 4, 6< In[282]:=tegers + 10 811, 12, 13< Out[282]= [email protected] In[283]:= Out[283]=10, 9, 8, 7, 6, 5, 4, 3, 2, 1< You can add (append to) elements and join lists: In[284]:[email protected], 4D Out[284]=1, 2, 3, 4< In[285]:[email protected], xD Out[285]=1319.77, b, c, d, x< In[286]:=uits = 8apples, oranges, pears
More Less
Unlock Document

Only pages 1,2 and half of page 3 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit