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Mastering Development

Graham Scan for calculating the convex hull of a given set of points in R

I need to code the Graham scan algorithm to find convex hull of a given set of points. I have been trying a lot and, I do not achieve a solution. I have the following code for graham function grahamScanConvexHull<-function(points){ vertices <- data.frame(x=double(), y=double()) flag <- T # Get the most left down_point and leave […]

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Mastering Development

Type error in declaration part in typescript (Angular/React)

When i tried run the below component it showing type issue in my declartion Below is the issue what i am getting Type ‘{ First: string[]; Second: string[]; Third: string[]; Four: string[]; }’ is missing the following properties from type ‘any[]’: length, pop, push, concat, and 28 more. TS2740 Interface headers declartion I have tried […]

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Mastering Development System & Network

Change certificate MS Exchange

I need to change the certificate in an Exchange environment with several servers. The certificate has not yet expired. I use the same certificate for SMTP, IMAP, POP, IIS etc and a send connector towards Office 365. In this setup I have 3 questions: When I change the send connector certificate, does it change it […]

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Mastering Development System & Network

Change certificate MS Exchange

I need to change the certificate in an Exchange environment with several servers. The certificate has not yet expired. I use the same certificate for SMTP, IMAP, POP, IIS etc and a send connector towards Office 365. In this setup I have 3 questions: When I change the send connector certificate, does it change it […]

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Mastering Development

Creating a new column into a dataframe based on conditions

For the dataframe df : dummy_data1 = {‘category’: [‘White’, ‘Black’, ‘Hispanic’,’White’], ‘Pop’:[’75’,’85’,’90’,’100′],’White_ratio’:[0.6,0.4,0.7,0.35],’Black_ratio’:[0.3,0.2,0.1,0.45], ‘Hispanic_ratio’:[0.1,0.4,0.2,0.20] } df = pd.DataFrame(dummy_data1, columns = [‘category’, ‘Pop’,’White_ratio’, ‘Black_ratio’, ‘Hispanic_ratio’]) I want to add a new column to this data frame,’pop_n’, by first checking the category, and then multiplying the value in ‘Pop’ by the corresponding ratio value in the columns. For […]

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Mastering Development

Creating a new column into a dataframe based on conditions

For the dataframe df : dummy_data1 = {‘category’: [‘W’, ‘B’, ‘H’,’W’], ‘Pop’:[’75’,’85’,’90’,’100′],’W_ratio’:[0.6,0.4,0.7,0.35],’B_ratio’:[0.3,0.2,0.1,0.45], ‘H_ratio’:[0.1,0.4,0.2,0.20] } df = pd.DataFrame(dummy_data1, columns = [‘category’, ‘Pop’,’W_ratio’, ‘B_ratio’, ‘H_ratio’]) I want to add a new column to this data frame,’pop_n’, by first checking the category, and then multiplying the value in ‘Pop’ by the corresponding ratio value in the columns. For […]

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Development

Repeated time values within panel in stata

I have data from 3 Canadian ports that are importing from 16 country partners The data is organized by years (2013 to 2017) and for months (odd months only). The data is also organized by country of origin, load port, destination province and city. My dependent variable is trade volume and my independent variables are […]

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Development

how to join with IIF function?

Hi I am using MSSQL 2017 and try to figure out how this code works DECLARE @customer TABLE ( credithold bit, id int primary key, deliverycityID int, postalcityID int ) DECLARE @city TABLE ( cityid int primary key, pop bigint ) INSERT INTO @city VALUES (1,2666),(2,7889),(3,28917) INSERT INTO @customer VALUES(1,1,2,1),(0,2,3,2),(1,3,1,3),(0,4,2,3) SELECT c1.id, pop, IIF(credithold = […]

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Development

Typescript reducer issue

I have the following: … type RepairsState = { data: Property[] /* Property is an object coming from another file */ } type RepairsPropertyLoadAction = { type: typeof REPAIRS_PROPERTY_LOAD payload: { models: Property[] } /* the payload will return an object that has a models property of an array of objects that match my property […]

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Development

I have to click the button twice to get states to render correctly in React

I am working with React and I have a button that is suppose to set a state <button class=”button” onClick={this.setRecommendations}> Log Into Spotify </button> This calls the fucntion setRecommendations(){ recommendations().then(recs => { this.setState({recommendations: recs}); }); } which updates this state recommendations: [], so when I click the button I wait a while, and nothing happens, […]