Leafletjs heatmap - leaflet

Question

Leaflet has a nice heatmap layer, but which I am finding difficulties to handle when zooming into the map.
I can set the data to have a radius of 0.1 and they look very nice when I have a zoom level of 8.
If a user zooms in to a level of, say 10, the map becomes entirely covered by the heatmap.
Also, if the user zooms out to level 6 the heatmap becomes invisible.
Can anyone, please, let me know how to scale the radius of data points of the heatmap, so as to obtain a similar effect to that of Google Maps Heatmap?
Thank you!
EDITED:
I used the heatmap from Patrick Wield heatmap.js
The code I used is as follows:
<script>
window.onload = function() {
var myData = {
max: 1000,
data: [
{lat: 50.32638, lng: 9.81727, count: 1},
{lat: 50.31009, lng: 9.57019, count: 1},
{lat: 50.31257, lng: 9.44102, count: 1},
]
};
var baseLayer = L.tileLayer(
'http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',{
attribution: 'Map data © OpenStreetMap contributors, CC-BY-SA, Imagery © CloudMade',
maxZoom: 18,
minZoom: 7
}
);
var cfg = {
"radius": .1,
"maxOpacity": 1,
"scaleRadius": true,
"useLocalExtrema": true,
latField: 'lat',
lngField: 'lng',
valueField: 'count'
};
var heatmapLayer = new HeatmapOverlay(cfg);
var map = new L.Map('map', {
center: new L.LatLng(50.339247, 9.902947),
zoom: 8,
layers: [baseLayer, heatmapLayer]
});
heatmapLayer.setData(myData);
layer = heatmapLayer;
};
</script>