Text Mining & Basic Calculations Supplemental Resources on Class Website

Concept Map Big Data Excel Features Implementation Data Mining Yields Business Intelligence Accuracy Design

Objectives ▪ Define Big Data and Data Mining ▪ Explain the Accuracy principle of Spreadsheet Design ▪ Demonstrate Excel features that support basic spreadsheet analytics.

Facebook Users ▪ 1.28 billion users worldwide ▪ 802 million users login daily (up 21%) ▪ 67% of Internet users are on FB ▪ 50% of year olds login when they wake up ▪ year old age group has grown 46%

Facebook Content ▪ 4.5 billion likes daily (up 67%) ▪ 30 million photos uploaded daily ▪ 1 in 5 page views in US ▪ 36% users post brand-related content on their walls

King of Social Media ▪ FB accounts for 66% of social media sharing on iPhones ▪ Users with income over $75,000 Facebook73% Twitter17% Pinterest13%

Facebook & e-commerce ▪ 10 million registered small businesses ▪ Drives 26% of referral traffic to e- commerce sites ▪ 20% of shoppers prefer buying thru FB vs. e-commerce website ▪ 58% of businesses see a drop in marketing costs when moving to FB

▪ Data sets too large to process with traditional database technology Big Data

Data Mining Tools ▪ software that searches through data ▪ uses complex statistical calculations ▪ outputs ▪ Trends ▪ Patterns ▪ Correlations ▪ Exceptions

Nestle ▪ Nestle processes Social Media ?videoId=

Import ▪ Access data not formatted as an Excel document ▪ File type = txt or csv

Import – Step 1 ▪ File, Open, File type = All files

Import – Step 2

Import – Step 3 ▪ Save As File type = Excel Worksheet

Text Mining ▪ Search ▪ Parse ▪ Concatenate ▪ SEARCH ▪ LEFT, MID, RIGHT, LEN ▪&▪&

SEARCH Function

LEFT Function

LEN or Length Function

RIGHT Function

MID Function

Concatenate ▪ & is the concatenate symbol ▪ Quotes are required around constant strings of text

Relative Cell Addressing ▪ Relative is the default ▪ When you copy a relative cell reference the reference will change depending on the direction and magnitude of the copy.

Copy Formula with Relative Cell Addresses

▪ Formula ▪ created by you ▪ = A1 + A10 ▪ Function ▪ keyword defined by Microsoft ▪ =SUM(A1:D1) ▪ Functions are more flexible than formulas Formula vs. Function

Different Results =B3+B4+B5+B6 =SUM(C3:C6) If you delete Row 5 =SUM(C3:C5)

▪ SUM ▪ AVERAGE ▪ MIN and MAX ▪ COUNT Common Functions

Cell AddressReferenceChanges when Copied A1RelativeVertically or Horizontally $A$1AbsoluteNever $A1MixedVertically A$1MixedHorizontally

▪ Is the formula entered going to be copied? ▪ If so, which direction? ▪ If it’s copied vertically, do you want the row references to change? If it’s copied horizontally, do you want the column references to change? ▪ Do you want such a change to take place? Cell Reference Decisions

1.Will you copy this function? 2.If so, which direction: vertical or horizontal? 3.If you copy vertically, Excel will automatically change all relative row references. Do you want those row references to change? Cell Reference Example #1 = SUM(B2:D2 )

Cell Reference Example #2 ▪ Which calculation needs a mixed cell reference? ▪ Where should the $ go?

▪ Know the order of operations. ▪ Select the correct function or construct the correct formula. (Choose a function over a formula.) ▪ Isolate assumptions. ▪ Check relative and absolute cell references. ▪ Double-check all calculations. Spreadsheet Design: Accuracy

▪ Store numbers in cells ▪ Write equations to point to cells containing numbers Isolate Assumptions

Isolate Assumption Example Assumption =E2+3 is incorrect =E2+H2 is correct

Paste Special - Values