Bar chart from many variables where varx = in Stata - bar-chart

I have a bar chart question here. Given that for all the variables in the dataset 1 = yes and 0 = No. I would like to plot a bar graph with the percentages (where var=1) on the y-axis and the variables on the x axis. Thanks in advance.
Dataset
Water
Ice
Fire
Vapor
1
1
0
1
1
0
0
1
0
1
1
1
1
1
1
1
1
1
0
1
1
1
1
0
0
1
1
1
0
1
0
1
0
1
1
1
1
0
1
1
0
1
0
0
0
1
1
0
1
0
1
0
1
0
1
0
1
1
1
1
0
1
0
1
1
0
1
1
1
0
1
0
1
1
0
1
1
0
0
1
0
1
1
1
1
1
0
1
1
0
0
1
0
1
1
1


The percent of 1s in a (0, 1) variable is just the mean multiplied by 100. As you probably want to see the percent as text on the graph, one method is to clone the variables and multiply each by 100.
You could then use graph bar directly as it defaults to showing means. I don't like its default in this case and the code instead uses statplot, which must be installed before you can use it.
* Example generated by -dataex-. For more info, type help dataex
clear
input byte(water ice fire vapor)
1 1 0 1
1 0 0 1
0 1 1 1
1 1 1 1
1 1 0 1
1 1 1 0
0 1 1 1
0 1 0 1
0 1 1 1
1 0 1 1
0 1 0 0
0 1 1 0
1 0 1 0
1 0 1 0
1 1 1 1
0 1 0 1
1 0 1 1
1 0 1 0
1 1 0 1
1 0 0 1
0 1 1 1
1 1 0 1
1 0 0 1
0 1 1 1
end
quietly foreach v of var water-vapor {
clonevar `v'2 = `v'
label var `v'2 "`v'"
replace `v'2 = 100 * `v'
}
* ssc install statplot
statplot *2 , recast(bar) ytitle(%) blabel(bar, format(%2.1f))


Try
. ssc install mylabels
checking mylabels consistency and verifying not already installed...
all files already exist and are up to date.
. sysuse nlsw88, clear
(NLSW, 1988 extract)
. mylabels 0(10)70, myscale(#/100) local(labels)
0 "0" .1 "10" .2 "20" .3 "30" .4 "40" .5 "50" .6 "60" .7 "70"
. graph bar (mean) married collgrad south union, showyvars legend(off) nolabel bargap(20) ylabel(`labels')
. table, statistic(mean married collgrad south union)
------------------------------
Married | .6420303
College graduate | .2368655
Lives in the south | .4194123
Union worker | .2454739
------------------------------
This relies on mylabels, and implements the bar gap (which I also like).

Related

This says its having two 2bit inputs so how to find the truth table

Question 2
A logic circuit is given two 2-bit binary numbers A and B as its inputs. The circuit consists of two outputs Y1 and Y2. The output values of YI and Y2 are obtained as follows:
If A<B, then Y1 and Y2 will be equal to A-B. Else Y1 and Y2 will be equal to A
a) Determine the truth table for the system
b) Obtain the simplified:
i SOP for Y1 and Y2.
ii. POS expressions for YI

Truth Table:
A1 A2 A B1 B2 B A<B? Y1=Y2=A-B||A Y11-Y21 Y12=Y22 Y13=Y23
0 0 0 0 0 0 n 0 0 0 0
0 0 0 0 1 1 y -1 1 1 1
0 0 0 1 0 -1 n 0 0 0 0
0 0 0 1 1 -2 n 0 0 0 0
0 1 1 0 0 0 n 1 0 0 1
0 1 1 0 1 1 n 1 0 0 1
0 1 1 1 0 -1 n 1 0 0 1
0 1 1 1 1 -2 n 1 0 0 1
1 0 -1 0 0 0 y -1 1 1 1
1 0 -1 0 1 1 y -2 1 1 0
1 0 -1 1 0 -1 n -1 1 1 1
1 0 -1 1 1 -2 n -1 1 1 1
1 1 -2 0 0 0 y -2 1 1 0
1 1 -2 0 1 1 y -3 1 0 1
1 1 -2 1 0 -1 y -1 1 1 1
1 1 -2 1 1 -2 n -2 1 1 0
Y11-Y21 K-MAP (Karnaugh map):
A1A2\B1B2 0 0 0 1 1 1 1 0
0 0 0 1 0 0
0 1 0 0 0 0
1 0 1 1 1 1
1 1 1 1 1 1
Y11-Y21 Sum Of Products:
A1 V (A1' ^ A2' ^ B1' ^ B2)
Y11-Y21 Product Of Sums:
(A1 v A2')^(B1' v A1)^(A1 v B1 v B2)
The rest is left was an exercise or for another Answerer.

MySQL Query to remove zero columns

MySQL query to remove all the columns from a table having sum of amount equal to zero
I have a table like this
Date Col 1 Col 2 Col 3 Col 4 Col 5
1/1/15 0 0 1 0 0
1/2/15 1 0 0 0 0
1/3/15 1 0 1 1 0
1/4/15 1 0 1 1 0
I want to get the out put table having the output data as given below
Date col 1 col 3 col 4
1/1/15 1 1 1
1/2/15 0 0 1
1/3/15 0 1 0
1/4/15 1 1 1
want to remove the col2 & col5 which have the sum amount equal to zero.

Find Average Mark For Each User - Mysql

First table :
UserId UserName
1 User1
2 User2
3 User3
4 User4
Second Table
Userid Mark Aptitude English Technical Status
1 40 1 0 0 S
1 30 0 1 0 F
2 60 0 0 1 S
2 75 0 1 0 F
2 25 0 1 0 F
3 45 1 0 0 F
3 45 1 0 0 D
3 50 0 0 1 F
3 50 0 0 1 F
I have this two table. I need a query to get the each user average mark in English, Aptitude and Technical. The average should be calculated only for status F. The result should be like this
UserId AptitudeAverage EnglishAverage TechnicalAverage
1 0 30 0
2 0 50 0
3 45 0 50
4 0 0 0

Try this:-
SELECT userID, IFNULL(AVG(case when Aptitude = 1 then Mark * Aptitude end), 0) AS AptitudeAverage,
IFNULL(AVG(case when English = 1 then Mark * English end), 0) AS EnglishAverage,
IFNULL(AVG(case when Technical = 1 then Mark * Technical end), 0) AS TechnicalAverage
FROM YOUR_TAB
WHERE Status = 'F'
GROUP BY userID;
This might help you.
Here is the fiddle.
http://sqlfiddle.com/#!9/e449f/21

logic function simplification and implementation

we are searching for the simplest implementation of this boolean logic function :
you can only use this logic elements : AND,OR,NOT,XOR.
thanks in advance.

Assuming this is the required truth table:
A B C D X
0 0 0 0 1
0 0 0 1 0
0 0 1 0 0
0 0 1 1 1
0 1 0 0 0
0 1 0 1 1
0 1 1 0 1
0 1 1 1 0
1 0 0 0 0
1 0 0 1 1
1 0 1 0 1
1 0 1 1 0
1 1 0 0 0
1 1 0 1 0
1 1 1 0 0
1 1 1 1 0
Then this seems to be the best implementation:
X = (A^B).(C^D) + (A'.B').(C^D)'

Boolean equation from circuit

Could someone please help me understand what the boolean equation performed by this circuit would be?

Label the output of the first mux X.
Then, create a truth table for X, then Y:
C D X A Y
---------
0 0 1 0 1
0 1 0 0 0
1 0 0 0 0
1 1 1 0 1
0 0 1 1 1
0 1 0 1 1
1 0 0 1 1
1 1 1 1 1
From inspection of the truth table:
Y = A + CD + C'D'