I have an array of objects that I want to display in highcharts. Every object has a name and a value.
I have tried to get this to work by doing
var objects = objectArray[]; // objectArray being an array of the objects I want data on
var objectNames = nameArray[]; // This being an array of all the names of the objects
var objectValues = valueArray[]; // An array of all the values of the objects
series: [{
data: objects.value,
name: objects.name
}]
This blew up on me. So I tried building the series like this:
series: [{
data: objectValues,
name: objectNames
}]
This gave me data for the values, but the name was all of the names in the objectNames array... for every single piece of data. so I tried using
series: [{
data: objectValues
},
{
data: objectNames
}]
This resulted in seeing the chart for the objectValues, and in the legend, another option for the names - which is completely unacceptable because there's no point in having a series of labels, right?
So I decided I would programmatically build out a series, using a foreach loop and then pass that into the constructor. However, http://www.highcharts.com/docs/getting-started/how-to-set-options/ says this is "bad code".
What I'm wanting is to be able to pass an array of objects to highcharts, tell it that every piece of data's 'name' is going to be the name value on that particular object, and the data is going to be tied to that particular object's value field. Is there a way to do this? Or is the only option what highcharts considers 'bad'?
So I found a solution.
After getting the data, I did
$.each(item, function (index, value) {
objects.push([value.name, value.value]);
});
And then bound my series with
series: [{
data: objects,
name: 'Value Type Description'
}]
So I have "Value Type Description" in the legend, but when I hover over a specific point I have the name as the label, and valid data displaying in graph form.
I found at http://api.highcharts.com/highcharts#series that if you have an array of two dimensional arrays, you can just pass a string as the first parameter and it would parse it as the label for that point.
EDIT: Example per request.
So you have two pieces to the series field, data and name. Name does NOT apply to the data, that will be the name of the axis.
So data is an array of key/value pairs.
data: [
{[key1, value1]},
{[key2, value2]},
{[key3, value3]}
]
And name is what the "main" label will be - "My Data Stuff" for example.
Then, when you load the chart, in the legend it should say "My Data Stuff", but when you hover over a specific point, say the first one, it will display the Key1 Value1 information.
data: [{
name: 'Point 1',
y: 1,
test1:9,
test2:'ddaf'
}, { -------> right
name: 'Point 2',
y: 5,
test1:12,
test2:'ddddaf'
}]
data: [{
my_name: 'Point 1',
y: 1,
test1:9,
test2:'ddaf'
}, { -------> we change 'name' to 'my_name',
my_name: 'Point 2', then the name you want to show become
y: 5, 'Slice', instead of 'Point 1','Point 2'
test1:12,
test2:'ddddaf'
}]
data: [{
my_name: 'Point 1',
my_y: 1,
test1:9,
test2:'ddaf'
}, { -------> Now,we get nothing.
my_name: 'Point 2',
my_y: 5,
test1:12,
test2:'ddddaf'
}]
So,the 'name' and 'y' is the key.
Related
Using mat-select in multiple mode, is it possible to pre-set the selected values if the values that are part of the select options are objects?
For example if the options in the select are as follows
toppingList: any[] = [
{ id: 1, description: 'Extra cheese' },
{ id: 2, description: 'Mushroom' },
{ id: 3, description: 'Onion' },
{ id: 4, description: 'Pepperoni' },
{ id: 5, description: 'Sausage' },
{ id: 6, description: 'Tomato' }
];
Then can you pre-set the selected values for that mat-select as such?
this.toppings.setValue([{ id: 1, description: 'Extra Cheese' }]);
Taking this stackblitz as an example you see that the the form values are getting set as desired, but the select buttons in the drop down itself are not showing as checked.
Is this even possible, or am I doing something wrong?
as i know for equality of two object, for example in java, you need write equal / hashcode for detect what object equal to another one.
you bind select value to object and typescript could not understand what compare object together. so i change your sample and bind value of options to id and it works!
see this stackblits
I'm trying to have Highcharts do the following: I want to show a column chart with three columns. The two first are to remain constant, the third is to be updated multiple times based on what the user chooses from a drop down-menu.
Choosing from the drop down-menu, I am able to have the third column update. If it's showing "Name 3" initially, choosing "Name 4" from the drop down menu will correctly replace the column. Choosing "Name 5" causes another correct replacement. However, if I then choose "Name 3" again, only the label will update, while the column and the y-value in the tooltip will not. Thus, it will say "Name 3", but use the y-value for "Name 5". How do I fix this behaviour?
The important thing here is user control of column 3. It would be okay to only show 2 column initially, if it's easier.
Code:
var data = {
"10 - Name 1": [700000],
"1001 - Name 2": [750000],
"1000 - Name 3": [800000],
"1002 - Name 4": [900000],
"1003 - Name 5": [950000]
};
var chart = Highcharts.chart('fig8', {
chart: {
type: 'column',
animation: true
},
series: [{
name: "10 - Name 1",
data: data["10 - Name 1"]
}, {
name: "1001 - Name 2",
data: data["1001 - Name 2"]
}, {
name: "1000 - Name 3",
data: data["1000 - Name 3"]
}],
title: {
text: 'Some metric'
},
subtitle: {
text: 'Choose unit from drop down to alter third column'
},
xAxis: {
labels: {
enabled: false
}
}
});
$("#sel").change(function() {
chart.series[2].update({
name: this.value,
data: data[this.value]
});
});
Here's a stripped down example: https://jsfiddle.net/RuneS/soh8vw79/10/
#jlbriggs is correct. Although the docs for update() don't say anything about it, it is mentioned in the docs for setData(): When updating series data, the default behavior is to update the values in the original data array instead of replacing the whole array.
In your case, that means that "Name 3"'s value is overwritten by the others' values when you select from the dropdown. There are at least two ways to fix this:
Force Highcharts to replace the data array by calling setData() with the updatePoints parameter instead of sending the data with update():
$("#sel").change(function() {
var unit = this.value,
val = data[unit],
ser = chart.series[2];
ser.update({ name: unit }, false);
//... false): Replace the series' data array instead of updating its values,
//(which would alter the original array in the global `data` object).
//https://api.highcharts.com/class-reference/Highcharts.Series#setData
ser.setData(val, true, true, false);
});
https://jsfiddle.net/soh8vw79/22
Don't give Highcharts the original array, but a copy of it. That way, updating the values won't affect the original data (similar to #jlbriggs solution). Added bonus: Smooth animation:
...
series: [{
name: "10 - Name 1",
data: data["10 - Name 1"]
}, {
name: "1001 - Name 2",
data: data["1001 - Name 2"]
}, {
name: "1000 - Name 3",
//Here, we use `.slice()` to make a copy of the original array,
//so that future updates don't change the original values in the global `data` object:
data: data["1000 - Name 3"].slice()
}],
...
https://jsfiddle.net/soh8vw79/23
I'm trying to specify column charts with objects for points. The reason for this is that I don't have to then split up the array of objects into separate arrays of categories and values.
I have tried the following, but neither works. (I'm interested in both specifying the category for columns, and specifying datetimes for x values.)
var data_1 = [
{x:new Date('2013-01-03'),y:2},
{x:new Date("2013-01-02"),y:6},
{x:new Date("2013-01-01"),y:4},
];
var data_2 = [
{category: "a", y: 3},
{category: "b", y: 3},
{category: "c", y: 4}
];
var create_chart = function(el, data){
var init_obj = {
chart: {
type: 'column'
},
series: [{
name: 'a',
data: data
}]
};
el.highcharts(init_obj);
};
create_chart($('#chart1'), data_1);
create_chart($('#chart2'), data_2);
In highcharts configuration you can set onyl one type of one xAxis. If xAxis has datetime type, you cannot use categoires. Only wayt o common both types is use two xAxis with different types.
I've created a chart that has an array of objects with named values like the following
data: [{
name: 'Point 1',
color: '#00FF00',
y: 0
}, {
name: 'Point 2',
color: '#FF00FF',
y: 5
}]
If I wanted to later look at back my data series later and get back the names "Point 1" and "Point 2", how would I do so?
I tried a function that iterates the data series like this:
var data = someSeries.data;
for ( var i = 0; i < data.length; i++ )
{
alert( data[i]['x'] );
}
which gets me each point, but obviously doesn't work since the x data is stored as a number (I tried doing an array with 2 values instead of the point configuration objects with similar results). 'name' is undefined for that data point as well.
Does the initial name that I entered when generating the series get saved anywhere for me to access? Am I looking at the wrong object?
If you are trying to reference data inside of the chart after initialization you need to reference the chart first. Then access the name property like you would with any other object property.
var myData = myChartName.series[0].data;
for ( var i = 0; i < myData.length; i++ )
{
alert( myData[i].name );
}
How can we get next elements name in Highcharts
for example
series: [{ name: 'weight', data: [50, 48, 80, 70]},
{ name: 'height',data: [5.8, 5.1, 6.1, 6.0]}
]
tooltip: {
formatter: function(){
return this.series.name;//i want to return here next elements name also is there any way
}
}
in the above tooltip iam returning only current element name, is there any way to get immediate next elements name there..?
You can always use shared tooltip, take a look: http://api.highcharts.com/highcharts#tooltip.shared