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CS100 Study Guide - Winter 2019, Comprehensive Midterm Notes - Https, Your Computer (British Magazine), Windowing System


Department
Computer Science
Course Code
CS100
Professor
Alexandra Boutros
Study Guide
Midterm

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CS100

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Excel
Values can be text values (lables) or number values or date/time and boolean
=sum(number1, number2 …)
=average(#1, #2…)
Can also add the different functions or…
=sum(average(#1,#2…),#1,#2…)
Can reference cells instead by using the cell number ex. =2d+4a
PMT calculates the payment =pmt(rate, number of payments, principal value)
Copy an paste, can copy the formulas
Autofill for excel, bottom right corner and you can drag it
- It can copy down the pattern or be the same as the formula if you are adding
ABSOLUTE REFERENCES
($A$1) keep the column and row the same (keep same cell)
($A1) keep the column the same but not the row
(A$1) keep the row the same but not the column
NAMED RANGES
Can name cells to make it easier
- Ex. Name something HST so use =16777*HST
- Even if you move the cell, formulas will still be using the HST name even tho it is in a
different cell, it will move with it
- advantages
o makes formula easier to interpret (understand and follow)
o people looking at sheet will know what’s going on
o don’t have to worry about absolute references since it is built in
- can also assign name to a range
o why?
o Can say =sum(range name)
o Can also use other functions
- If you add another line out of the range, go to formulas and use name manager
o It will show you all the areas that have a name
o You can edit the range with this and you can highlight the new range to include
the full thing
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Strings and lables
+ tax will give you #NAME?
How do you fix that? Use a single ‘
o Ex. ‘+ tax
You can also use quotations
o = “=Total” = Total
o Can use &
o &D5& glue 2 things together = “your total is “&D5&” pleas pay”
o =TEXT is a function takes a number and places it as text in some format
Can use =upper(…) to make it upper case
=left(text, number of characters)
=middle(text, starting character number, number of characters)
^ use to take out parts of a text
Find can be used to find the text within a text and the character number of
it
Working with multiple worksheets
=sheet1!cell+Sheet2!cell
o This will add 2 values from 2 different cells
Boolean Logic
You can either have true or false
AND, OR, xor
o XOR
You get either one or the other
o Inclusive or, or(x,y)
Having x, y, x and y are true
=cell>cell will give you true or false
o Can have < = etc.
Can use IF
o IF(content of cell is true, value if true, value if false)
o What if content of cell is not Boolean value, ex yes
use cell=”yes” to check if content is true
this converts it to a Boolean value
o can also use < > = etc
Can combine text together
cell&” “&cell&” “&”cell
can use if(isblank) function for Boolean logic
ex if all cells were filled you get Kris Kris Kris
o if one is blank you get Kris Kris
^ use cell&” “&IF(ISBLANK(cell),,cell&” “&”cell
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IFERROR(formula, “what you want to give it if there is an errer”)
Conditional formatting
Can customize cells and show you certain things about the data
o Example, failing = change cells to red
COUNTIF
=countif(range, criteria)
If you want the criteria to be >1000 you need to put in quotations or it will interpret as a
formula
AVERAGEIF
=averageif(range, criteria, [average range])
COUNTIFS
Use to specify multiple criteria
o =countifs(criteria range1, criteria1, criteria range2, criteria2)
VLOOKUP
=VLOOKUP(lookup value, table, column index number, range lookup)
Last thing is a boolean value, will be true for approximate match or false for exact match
CHARTS (usually place the chart in a whole new sheet)
Column chart good for categories
Line chart good for data that changes over time
Pie chart good for parts of a whole, ex. Expenses: rent tuition food…
Scatterplot good for correlations between 2 variables
Pivot tables + pivot charts (insert pivot tables)
o Good for large data sets
o Allow you to pick and choose certain parts and look at the important parts of the
data sets
o Change rows columns data and apply filters
o Data chart allows the same thing but displays the table in a chart format
Adding this gives you another pivot table and adds in a pivot chart
FILTERS
You can apply filters to large sets of data so you can filter out stuff
SUMPRODUCT
=sumproduct(array1,array2,arry3…) adds the range and multiplies them
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