I want to do a linear regression in Data Studio. I don't know if there is something already existing (I've looked ans it doesn't seem like there is).
What I want is not plotting a linear Regression in a graph but to obtain the Linear regression's coefficients to then make predictions on some user-defined input parameters.
I more or less know how to code the linear regression function in JS. Is there a way to create a field which would take some parameters as an Input and a returns the output JS custom process (involves looping)? I'm not particularly attached to the whole JS process solution if someone has an answer that solves my problem I'm open to it.
You can create a community viz in Data Studio to do this.
Easiest way to do it would be to first assume:
you have a blank HTML page.
your dependent and independent variables are in JS arrays.
you are creating a single page JS application independent of Data Studio.
Starting from there,
write the entire code in JS to calculate the parameters
surface the parameters using JS created DOM elements
use JS to create input elements to take user input of dependent variables
use user input and parameters to make prediction and surface that
So essentially you will end you with a single page JS application. Once this is ready, you can wrap this in the Community Viz framework, link the arrays to the data form Data Studio, and then use the viz in your reports.
Related
I have a bokeh server application that displays data in a graph.
I want to be able to get a value from JavaScript and pass it to the bokeh server script and run a function with that new information that will manipulate the graph.
For example;
I have a series of buttons in JavaScript, when the button is pushed, I want to change the data from 'The number of Icecreams sold.' to 'the number of pizzas' by manipulating a variable.
I know that we can achieve this using bokeh's built-in buttons, but I'm really looking for a way for a way to achieve that from an 'on click' from the java side.
From my research, it seems there are plenty of ways to get python to do something to java, but not the other way around.
Is there any advice out there that might set me down the path?
You can define your own Javascript callbacks in the Python code. See the bokeh docs describing this here.
I currently use a local Tomcat/JSP service/webpage to get data with sql and display it on the webbrowser with plotly (locally rendered with this javascript library). I want to do more data wrangling by the user like filtering and cannot do it with sql since the sql query takes several seconds and several sql queries for one webpage would take too much time. Within JSP data filtering is quite complicated since you have to write you own filter functions like https://blog.pavelsklenar.com/using-filteredrowset-simple-example/ or http://www.java2s.com/Code/Java/Database-SQL-JDBC/FilteredRowSetDemo.htm . If you know Pythons Pandas or sql this seems too complicated.
I wonder if Zeppelin is a good solution with these steps:
Get the data directly via sql (already works) but the integrated display possibilities are nice but not sufficient for me.
A user can adjust several filters (e.g. column1 between 1 and 3 and so) using the AngularJS view (https://zeppelin.apache.org/docs/0.7.3/displaysystem/front-end-angular.html).
Read the filter ranges from the last paragraph and do data wrangling with python’s pandas with some filters and save it a new dataframe.
Use this filtered dataframe and plot the data with a local plotly.js file (I have the pure plotly JS code). In general, it could work with an %angular paragraph as Using d3.js with Apache Zeppelin (even without the code from “else”, so d3 seem to be useable within zeppelin out of the box). But I wonder
how to pass the dataframe from Python to the Angular node. According to https://zeppelin.apache.org/docs/0.7.3/displaysystem/back-end-angular.html I have to use Spark to use the variables; so it seems that I have to integrate a spark wrapping paragraph. After that do I have to write code that converts the dataframe to JSON or similar?
how to use plotly or other local javascript files? How can I specify the location?
What do you think or do you have other/better ideas?
I solved the problem by using a non interavtive (that means no javascript library like plotly or d3) by using pythons matplotlib for the plotting task.
I am wondering and sadly I don't know where else to ask the question.
I want to make a interactive chart using the top 5 downloaded movies.
And the current box office top 5. How i'm going to make this interactive is beyond me yet.
What I would like to know first is, if there is any way to manipulate or change the given chart from Mojo.
Right now I use:
http://boxofficemojo.com/about/data.htm
With the code given by Mojo:
<script type="text/javascript" language="javascript" src="http://www.boxofficemojo.com/data/js/wknd5.php?h=myclass1&r=myclass2"></script>
This just shows me the top 5 (see example at the previously provided URL).
Is there any way that I can use that chart and make a, pie chart or any other chart or graph out of it?
And if this is possible will it still update with money and new movies every time the site does, like the given chart with the javascript code does right now?
Hopefully someone can help me or maybe has a different way of making a chart/graph out of this data (the box office top 5).
So to be more clear. I would like to create my own chart/graph with the box office top 5 data. And I would also like it to be "live" and update itself when ever the top 5 changes or the numbers change.
There for it doesn't seem like the best idea to create my own Json with data since it won't update when the data updates without me making changes into the Json file.
The interactive part doesn't matter yet.
You want to create a chart with live data.
First thing is getting the data.
The script you are including basically creates the chart for you. So you don't have direct access to the data itself, so it would be a little tricky to use that.
You should google around for a,preferrably REST API, that provides you with data on-demand.
1. Find a suitable REST API and perform calls to fetch data
You perform HTTP requests to the API and it provides data - so on page-load for example you will request data from this API. So each time a user loads your website a call is made and it fetches the most recent data on movies.
2. Parse the data, perform calculations and built your own custom JSON
Then you need to parse that data - Take from this raw feed the data you actually need - perform calculations if needed(from what I take from your question, it's gonna be simple elementary school maths), then build you own custom JSON data structure that can be used to display the data.
3. Visualize the JSON
Include a JS library that renders Charts. Chart.js, is an excellent example and it's dead-simple to provide a JSON and render a really nice looking chart.
That's how it ,usually, goes.
I have a question about how to approach a certain scenario before I get halfway through it and figure out it was not the best option.
I work for a large company that has a team that creates tools for the team mates to use that aren’t official enterprise tools. We have no access to the database directly, just access to an internal server to store our files to run and be able to access the main site with javascript etc (same domain).
What I am working on is a tool that has a ton of options in it that allow you to select that I will call “data points” on a page.
There are things like “Account status, Balance, Name, Phone number, email etc” and have it save those to an excel sheet.
So you input account numbers, choose what you need and then using IE Objects it navigates to the page and scrapes data you request.
My question is as follows..
I want to make the scraping part pretty Dynamic in the way it works. I want to be able to add new datapoints on the fly.
My goal or idea is so store the regular expression needed to get the specific piece of data in the table with the “data point option”.
If I choose “Name” it knows the expression for name in the database to run again the DOM.
What would be the best way about creating that type of function in Javascript / Jquery?
I need to pass a Regex to a function, have it run against the DOM and then return the result.
I have a feeling that there will be things that require more than 1 step to get the information etc.
I am just trying to think of the best way to approach it without having to hardcode 200+ expressions into the file as the page may get updated and need to be changed.
Any ideas?
IRobotSoft scraper may be the tool you are looking for. Check this forum and see if questions are similar to what you are doing: http://irobotsoft.org/bb/YaBB.pl?board=newcomer. It is free.
What it uses is not regular expression but a language called HTQL, which may be more suitable for extracting web pages. It also supports regular expression, but not as the main language.
It organizes all your actions well with a visual interface, so you can dynamically compose actions or tasks for changing needs.
I am just a newcomer developing an app with html/css/js via phonegap. I've been searching info on how to make my app be displayed in different languages and Google doesn't understand me.
So the idea is to have a button on index.html that let the user choose the language in which the app will be displayed, in this case Spanish/English, nothing strange like arabic blablabla....
So I guess that the solution must be related to transform all the text that I load in html to variables and then depending on the language selected display the correct one. I have no idea how to make this, and Im not able to find examples. So that's what Im asking for... if someone could give some code snipet to see how html variables works and how should I save user language selection...
Appreciated guys!
This can be done by internationalization (such as i18N). To do this you need separate file for each language and put all your text in it. Search Google for internationalization.
Otherwise you can look into embeding Google Translate.
This depends on the complexity of language-dependencies in the application. If you have just a handful of short texts in a strongly graphic application, you can just store the texts in JavaScript variables or, better, in properties of an object, with one object per language.
But if you expect to encounter deeper language-dependencies as well (e.g., displaying dynamically computed decimal numbers, which should be e.g. 1.5 in English and 1,5 in Spanish), then it’s probably better to use a library like Globalize.js (described in some detail in my book Going Global with JavaScript and Globalize.js). That way you could use a unified approach, writing e.g. a string using Globalize.localize('greeting') and a number using Globalize.format(x, 'n1') and a date using Globalize.format(date, 'MMM d').