I am new to d3 and I have objects that are connected to each other. Each of these objects has multiple fields that I want to display. I was wondering how can you do this in d3.
I’m not sure I understand the question, but what I think you’re going for is something like this:
Make your selection and bind the data.
let update = d3.selectAll(".object").data(objects);
Remove old elements (if necessary).
update.exit().remove();
Create an enter selection and append a child for each field.
let enter = update.enter()
.append("g").attr("class", "object");
enter.append("g").attr("class", "field1");
enter.append("g").attr("class", "field2");
Merge your enter selection back into update, then fill in the fields.
update = update.merge(enter);
update.select(".field1").text(d => d.field1);
update.select(".field2").text(d => d.field2);
Related
Currently I have 4 charts. The selection (via column or legend) of a category from the main one triggers multiple events. It changes the selected item's color on two charts and it creates two more charts.
For the two created charts, I'm having problems with redrawing/removing (that is what I'm assuming I will have to do) when the column/legend is deselected.
I may be wrong but from what I've looked at, it seems that when you prevent show/hide it doesn't change the visibility property so I wasn't sure if there was a way to use that.
Any help would be appreciated!
Fiddle here: http://jsfiddle.net/jlm578/gy9og69r/4/
I also thought about whether I needed to add it into the logic of the function (possibly one below) or if the sibling aspect needed to be added to the others.
function drawSignifNonSignifEruptionsChart(series){
if (series.index == '0'){
var eruptVEI = ['VEI 0'];
var signifErupt = [10];
var nonSignifErupt = [600];
}
So I've been looking for a way to do this and found many interesting answers about Google App Scripts, but none seem to get at what I am trying to do. I am looking to have a Google Sheet (Spreadsheet) with a column of choices. Then I have multiple forms which has a question that uses a drop down menu of those same choices. However, this list of choices gets updated semi often, so we currently find ourselves manually updating 6+ forms with the new information based off of the sheet. I'd like to know if there is a way to take the information from a spreadsheet and have it automatically update the drop down list.
I haven't really done any Google Script stuff, but I can hold my own in scripting generally. I just need help finding the right direction.
You can try getting a range of values from the sheet and loop through a column until last row as below code.
var values = SpreadsheetApp.getActiveSheet().getDataRange().getValues()
for(n=0;n<values.length;++n){
var cell = values[n][x] ; // x is the index of the column starting from 0, replace x with some value
}
Once you get the values into cell variable, you can simple add them to the form drop down list.
// Open a form by ID and add a new list item.
var form = FormApp.openById('1234567890abcdefghijklmnopqrstuvwxyz');
var item = form.addListItem();
item.setTitle('Do you prefer cats or dogs?')
.setChoices([
item.createChoice('Cats'),
item.createChoice('Dogs')
]);
You can refer to this documentation.
Hope that helps!
You should be able to use a formRanger AddOn which would allow you to update a spreadsheet.
This would then automatically update all the drop down dependent on the data you have added to the spreadsheet.
I have a combined bar / line chart. For each row in the input file, I create a group that contains multiple elements (lines, rectangles, texts):
var myGroups = svg.selectAll('g').data(myData)
myGroups.enter().append('g')
...
myGroups.append('line')
...
myGroups.append('polygon')
...
myGroups.append('text')
...
I currently just
svg.selectAll('*').remove()
and create everything from scratch every time the data are updated. However, I'd like to have a smooth transition for all elements.
I've gone through this tutorial several times, but I still don't understand how I can do it in my case.
The key is to handle all the selections, not just the enter selection:
var myGroups = svg.selectAll('g').data(myData);
// enter selection
var myGroupsEnter = myGroups.enter().append("g");
myGroupsEnter.append("line");
myGroupsEnter.append("polygon");
// ...
// update selection -- this will also contain the newly appended elements
myGroups.select("line").attr(...);
// ...
// exit selection
myGroups.exit().remove();
There are two things here that warrant further explanation. First, elements in the enter selection that have had new elements appended merge into the update selection. That is, there is no need to set attributes on the elements in the enter selection if the same thing happens in the update selection. This allows you to append new elements and update existing ones without duplicating code.
The second thing becomes important on subsequent calls with updated data. As the elements you're binding the data to are not the ones that are actually drawn, the new data needs to be propagated to them. This is what .select() does. That is, by doing myGroups.select("line"), you're propagating the new data bound to the g elements to their children line elements. So the code to set attributes is the same as for the enter case.
Now you can simply add transitions where desired before setting the new attributes.
Is there a way in D3 to concatenate selections?
Use case: I'd like to add a mouseover event to both the update and enter selections of a particular selection.
I can do this as follows:
var s = d3.selectAll('.yellow').data(myData);
s.on('mouseover'...
s.enter().append('path').attr('class','yellow').on('mouseover'...
But I'd prefer to do it with one line of code.
In this particular case you don't need to concatenate -- the enter selection merges into the update selection after it's been called, so all you need to do is handle .enter() before the update selection.
In general, you can't really concatenate selections as such, but in practice this isn't really necessary. You can either modify the selection condition to select all the elements you need, or, if this is not possible, use .call() to run a function on all selected elements. This way you don't need to repeat the code to set attributes etc.
I'm showing to my users, a list of items within a UltraGrid, that come from database.
Now, i'm with one need and I don't find anything useful or any documentation that is clear nor none tutorial is available where I can learn.
I need extend the functionality of this grid, to, set a (+) Expand function, that, when the user press that button (+), the row expands and shows the items that are in the History.
It is anyone in the world that can help me to solve this issue or indicate appropriate docs where I can Learn?
Very thanks.
The trick is simple. You just need to bind the grid to a DataSet that contains two (or more) tables and the correct DataRelation object that glues together the tables.
You need also to be sure that the property grid.DisplayLayout.ViewStyle is set to MultiBand (it is the default so it should be already set).
So, for example, in this pseudocode I load two tables and add them to a dataset, then I define a supposed relation between the columns involved and at last I bind the dataset to the grid.
DataSet ds = new DataSet();
DataTable dtItems = YourLoadDataTableMethodHere("Items");
ds.Tables.Add(dtItems);
DataTable dtHistory = YourLoadDataTableMethodHere("History");
ds.Tables.Add(dtHistory);
DataRelation rel = new DataRelation("Items_History_Relation",
dtItems.Columns["IDItem"],
dtHistory.Columns["IDItem"]);
ds.Relations.Add(rel);
grid.DataSource = ds;
This will automatically force the UltraGrid to create two Bands (grid.DisplayLayout.Bands[]), in the first Band (Band[0]) you will find the rows of the Items datatable, each row has its [+] button to click and expand the second Band (Band[1]) where you will see the History rows related to the row in the first Band