I created a simple line chart in Extjs4 for one of my projects, and the chart is not plotting the right data.
The chart uses the same store as the grid, but not showing the same data. Is there any way to trace the source of the problem, if not fixing it altogether?
The following is the code I use to generate the chart.
{
xtype: 'chart',
animate: true,
shadow: true,
store: 'Dataalls',
legend: {
position: 'top'
},
axes: [{
type: 'Numeric',
position: 'left',
title: 'Wind Speed',
fields: ['windspeed'],
grid: true
}, {
type: 'Category',
position: 'bottom',
title: 'Time',
fields: ['time']
}],
series: [{
type: 'line',
axis: 'left',
xField: ['time'],
yField: ['windspeed']
}]
}
(I tried using type: 'Time' for the x axis but gets the error "date.getFullYear is not a function" )
For the date.getFullYear() I suspect your date string is not parsable into a Date object. Could you post your other supporting code, ideally the full code of the Store and Grid? If you'd like to use the Time Axis you'll need to convert your date String into a date object via something along the lines of:
Ext.define('Your.Model', {
extend: 'Ext.data.Model',
fields: [
{name: 'dateString', type: 'string'},
{name: 'date',
convert: function(value, record) {
year = value.substring(0,4);
month = value.substring(5,7).replace(/^[0]+/g,"");
day = value.substring(8,10).replace(/^[0]+/g,"");
hour = value.substring(11,13).replace(/^[0]+/g,"");
// etc for min, sec, millis
return new Date(year, (month - 1), day, hour, 0, 0);
}
}
]
});
For debugging the chart not displaying correctly, I'd place assign your chart object to a var and in Firebug breakpoint after that variable assignment to be able to inspect your chart js object and look at the data inside.
I had a similar problem when using Time. Just fixed it by defining my model field types:
fields: [{name: 'date', type: 'Date'}, {name: 'close',type:'float'}]
As for why your chart is plotting like that, I got that before too, I realised that the json was passing it as a string, so I need to to be defined as a float too. I did a fix for that on the php end, by forcing it as a float first before I passed it over as json.
Related
This is something about the ExtJs5 charts.I have trouble changing the bar chart's labels.
Codes is as below:
Ext.create('Ext.chart.CartesianChart', {
store: {
fields: ['pet', 'households', 'total'],
data: [{
pet: {name:'Cats'},
households: 38,
total: 93
}]
},
axes: [{
type: 'numeric',
position: 'left'
}, {
type: 'category',
position: 'bottom'
}],
series: [{
type: 'bar',
xField: 'pet',
yField: 'households',
label:{
field:'pet',
renderer:function(pet){
return 'Dear '+pet.name;
}
}
}]
});
You must have noticed that the field 'pet' is an object instead of a string.
The renderer in the series label returns the value I want it to be,but the label is still [object Object]!
Labels under the category(x axis in your code) are rendered by 'category' not the series.Try code below:
{
type: 'category',
position: 'bottom',
renderer:function(label){
return label.name;//the var 'label' represents the pet object.
}
}
By the way,I found another problem. No matter how many models are there in the chart store,only the first bar is displayed!
Can someone please take a look at this example? It works when I use a smaller data set, but when I use a larger historical data set, it stops working and the data series does not render. Please help.
Small data set example - http://jsfiddle.net/Yrygy/250/
Large data set example (SERIES DOES NOT RENDER) - http://jsfiddle.net/Yrygy/249
var chart = new Highcharts.StockChart({
chart: {
renderTo: 'container',
height: 120
},
navigator: {
series: {
data: chartData
}
},
series: [{
data: [null],
markers: {
enabled:true
}
}]
});
You need to have your data sorted in ascending time order. Currently your "large" data set is not.
There is a couple of problems. First of all, as said #wergeld, you need to sort your data:
chartData.sort(function(a,b) { return a[0] - b[0]; });
Then the problem is with setting option for navigator:
navigator: {
series: [{
name: 'MSFT',
data: chartData
}]
},
When should be an object, not an array:
navigator: {
series: {
name: 'MSFT',
data: chartData
}
},
And the last one, do you really need to set xAxis.min/max ? Escpecially to values 2 and 4. when you have timestamps like
Working demo: http://jsfiddle.net/Yrygy/253/
I am using Highcharts to plot JSON Data. The dates are in the string format.
JSON Data:
[{"BRENT_SPOT":70.88,"TRADE_DATE":"31-JUL-2009"},{"BRENT_SPOT":73.28,"TRADE_DATE":"03-AUG-2009"},{"BRENT_SPOT":74.31,"TRADE_DATE":"04-AUG-2009"},{"BRENT_SPOT":74.96,"TRADE_DATE":"05-AUG-2009"},{"BRENT_SPOT":74.4,"TRADE_DATE":"06-AUG-2009"},{"BRENT_SPOT":72.84,"TRADE_DATE":"07-AUG-2009"},{"BRENT_SPOT":73.29,"TRADE_DATE":"10-AUG-2009"},{"BRENT_SPOT":72.04,"TRADE_DATE":"11-AUG-2009"}]
HighCharts / JQuery Code :
<script>
var chart;
$(function() {
var options = {
chart: {
renderTo: 'container',
zoomType: 'xy',
type: 'line'
},
title: {
text: 'Brent Daily Price Curve (FPC as at <cfoutput>#f_date#</cfoutput>)'
},
xAxis: {
labels: {
rotation: 45,
step: 3
},
type: 'category'
},
yAxis: {
lineWidth: 1,
title: {
text: '$ USD'
},
min: 0
},
series: []
};
$.getJSON("brentpricehc_test.cfm?f_date=<cfoutput>#f_date#</cfoutput>", {}, function(jsonResult) {
var BrentUSDPrice = {
name: "Brent Spot (USD)",
type: "line",
data: [],
marker: {
radius: 2
}
};
$(jsonResult).each(function(index) {
BrentUSDPrice.data.push([this.TRADE_DATE, this.BRENT_SPOT]);
});
/*options.series[0] = BrentUSDPrice;*/
options.series.push(BrentUSDPrice);
chart = new Highcharts.Chart(options);
});
});
</script>
I'm unable to plot any values wrt each of the date strings. I tried converting the JSON dates to datetime instead but still the same issue.
Few More details (for testing purposes):
Modifying to the below line plots the graph with the correct "brent_spot" values. This means that the issue lies with the way the "trade_dates" are 'not' plotting.
BrentUSDPrice.data.push([index, this.BRENT_SPOT]);
Edit 2 : (Using Datetime type to make the code work)
JSON Data (New): Returned as TO_CHAR(TRADE_DATE, 'YYYY/MM/DD')
[{"BRENT_SPOT":70.88,"TRADE_DATE":"2009\/07\/31"},{"BRENT_SPOT":73.28,"TRADE_DATE":"2009\/08\/03"},{"BRENT_SPOT":74.31,"TRADE_DATE":"2009\/08\/04"},{"BRENT_SPOT":74.96,"TRADE_DATE":"2009\/08\/05"},{"BRENT_SPOT":74.4,"TRADE_DATE":"2009\/08\/06"},{"BRENT_SPOT":72.84,"TRADE_DATE":"2009\/08\/07"},{"BRENT_SPOT":73.29,"TRADE_DATE":"2009\/08\/10"},{"BRENT_SPOT":72.04,"TRADE_DATE":"2009\/08\/11"}]
$(jsonResult).each(function(index) {
BrentUSDPrice.data.push([new Date(this.TRADE_DATE), this.BRENT_SPOT]);
});
Server side language used : Coldfusion
Database : Oracle
Am I doing something silly somewhere?
I have just tried your code, and it works perfectly fine, see: http://jsfiddle.net/3bQne/1026/
I guess, you need to update to Highcharts 3.0.10 to get this working.
If you are using type: 'category' then you need to assign name: to the data points. See the categories entry at http://api.highcharts.com/highcharts#xAxis
If categories are present for the xAxis, names are used instead of numbers for that axis. Since Highcharts 3.0, categories can also be extracted by giving each point a name and setting axis type to "category".
So the question is whether you are using Highcharts 3.0 and if you do then it needs to look something like this:
data: [{
name: 'Point 1',
color: '#00FF00',
y: 0
}, {
name: 'Point 2',
color: '#FF00FF',
y: 5
}]
see: http://api.highcharts.com/highcharts#series.data
For my chart, I use pieChartDataSource as my doughnut chart's data source. I've been pouring over the documentation to figure out a way to, instead of labeling the segments with valueField, display an additional field that is not the argumentField.
In my console, I know that pieChartDataSource has the field I am looking for. It is an array of objects. Each object has several fields of which I have product as the argumentField and count as the valueField. My presumption is that I somehow have to use the tagField in order to pass additional properties.
To reiterate, I want to display owner (a third value), instead of product in the segment label of my chart. How would I customize the label so that it shows the owner?
// ...
dataSource: pieChartDataSource,
// ...
series: { type: 'doughnut',
argumentField: 'product',
valueField: 'count',
tagField: 'owner',
valueType: 'numeric',
label: { visible: true,
font: {
family: 'sans-serif',
},
connector: { visible: false },
radialOffset: 0,
position: 'inside',
rotationAngle: 0,
customizeText: function () {/* use tagField here? */},
},
// ...
Can retrieve tag from point, that is an attribute of customizeText parameter
label: {
customizeText: function () {
return this.point.tag;
}
}
I'm using Highcharts/Highstock to plot a fairly large amount of data (~10,000 points). The data consists of Date objects on the X axis and floats on the Y, formatted as such: [[(date), 1.728], [(date), 0.346], ...]. The dates are always 1 hour apart and there are no gaps in the data.
When the chart's range is >= 21 days (such that at least 21 days of data is graphed), the chart appears correctly. Whenever the range is less than that, though, the chart becomes blank and the tooltip displays each point as having a Y-value of 0.0. The Y values for those points do exist in the array (I can see them in Firebug), but they aren't displayed on the chart. Here's how I'm initializing it:
mainChart = new Highcharts.StockChart({
chart: {
renderTo: 'linegraph'
},
rangeSelector: {
buttons: [{
type: 'day',
count: 1,
text: '1 d'
}, {
type: 'week',
count: 1,
text: '1 wk'
}, {
type: 'month',
count: 1,
text: '1 mo'
}, {
type: 'year',
count: 1,
text: '1 yr'
}, {
type: 'all',
text: 'All'
}],
selected: 2
},
series: [{
name: 'Electricity usage (kWh)',
data: graphData,
tooltip: {
valueDecimals: 2,
valueSuffix: "kWh"
}
}],
});
I had the same issue, but it was everything normal with timestamps on X axis.
Resolved it by sorting data by ascending (provided firstly in reversed order).
It turns out that you can't use Date in the X axis of your data. Instead, use the Unix timestamp of the date: Date.getTime(). Major props to FloppyDisk for pointing me in the right direction.