# COMM 290 Note ```Knowing how to use excel properly is crucial in this course.
Basic of Excel Knowledge
Error
Cel K6:
Cel K9: J9 is a text, which can’t be mathematically “sum up”to I9
Cel K10: Can’t find the name “sales”in the name manager (Formula -&gt; Name manager),
Fixed: make the name “sales”and include numbers using “Define name” (Formula -&gt; Name
manager -&gt; Define name).
Cel K11 : sqrt(-1) is not mathematically correct, so it caused an error of “#NUM!”
Cel K12: If Colm “H”is deleted, an error of “#REF”, which indicated
*How do I know where “K12”comes from? A: Formula -&gt; Fomula Auditing -&gt; Trace
Precedents, then an arrow will show the result.
Sheets:
Sheets are the “pages”of Excel. You can do all kind of adjustment (Color, Font, etc)
Color is usually used to make things more organized for business management.
*When making copy of sheet, you just need
Hiding Sheet by clicking “Hide”, and unhiding sheet by clicking “Unhide”
View:
A massive amount of data, alphabetically: population of all countries in the world from 1980-2010
When dealing with big data, how to see the heading and the country section when dealing a
specific date of data?
A: “View -&gt; Window -&gt; Freeze Panes”, then you can lock the heading and the country sections.
What is you wanna compare two countries?
A:
1. “View -&gt; Window -&gt; Split”, then
2. , then you will left will only two countries to compare
What if you wanna compare two files?
A: “View -&gt; Window -&gt; View side by side”, then
Formula
Formula vs Function: a formula is any calculation in Excel, but a function is a pre-defined calculation.
“=MAX(A1:B20)” is a formula containing a function.
Cel E2: what should I do to make it a sum of
1. Type “=B2+C2+D2”, which is doing it manually
2. Type “=”, then go to “Fomula -&gt; Insert Function” which is using a fomula
3. Type “=”, then go to “Fomula -&gt; Auto sum”which is using the function icon that has all the
normal fomular.
4. Type “=sum(B2:D2)”, which is doing it using fomula.
Names
When computing for interest (= p*r*t).
Cel E3: change the top left “E3”to “Interest”
1. A
2. Use “Fomula -&gt; ”
3. Use “”
Using fomular -&gt; Past name -&gt;
Conditional Format
What should you do if you wanna collect a large amout of data?
A: hold“Shift + Ctrl”, then press down, you will collect data from the starting cel until a blank.
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