If you don't mind doing this interactively, you could simply get your rep dump and parse it out.
This is obviously keyed to your cookie, so, as i said, it would have to be an interactive process.
Caveat: this code will do what you want, but I don't think the data coming from the api is usable right now....
You certainly could use the api to do something like this but in order to get the data in a form that will give you the points you want your min/max window would have to be from 1970 to 2050.
Except for the most obscenely reputed users this should not be an issue.
Here is a JavaScript example of grouping by day (because it is easy), using Soapi.JS2, which will have an alpha release announcement later today....
var context = new Soapi.ApiContext(apiKey);
context.initialize(function() {
context.official.stackApps.users().byId(14).reputation()
.fromdate("1/1/1970").todate("1/1/2040").pagesize(100).pagecount(0)
.invoke(function(items) { // items = collection of all your rep_change
var output = data
.GroupBy("Math.floor($.on_date.getTime() / 86400000) *86400000")
.Select("new Date($.Key()) + '\\t' + $.Sum('$.positive_rep - $.negative_rep') + '\\n'")
.ToString();
alert(output);
});
});
Same code, using scripted lamdas
var context = new Soapi.ApiContext(apiKey);
context.initialize(function() {
context.official.stackApps.users().byId(14).reputation()
.fromdate("1/1/1970").todate("1/1/2040").pagesize(100).pagecount(0)
.invoke(function(items) { // items = collection of all your rep_change
var output = items
.GroupBy(function(item) {
return Math.floor(item.on_date.getTime() / 86400000) * 86400000
}).Select(function(group) {
return new Date(group.Key()) + '\t' + group.Sum(function(item) {
return item.positive_rep - item.negative_rep
}) + '\n'
}).ToString();
alert(output);
});
});
Generated Requests:
http://api.stackapps.com/1.0/users/14/reputation?fromdate=25200&todate=2209014000&pagesize=100&page=1&jsonp=Soapi._jsonp2 http://api.stackapps.com/1.0/users/14/reputation?fromdate=25200&todate=2209014000&pagesize=100&page=2&jsonp=Soapi._jsonp3 http://api.stackapps.com/1.0/users/14/reputation?fromdate=25200&todate=2209014000&pagesize=100&page=3&jsonp=Soapi._jsonp4
Output:
Wed Aug 18 17:00:00 MST 2010 10 Tue Aug 17 17:00:00 MST 2010 20 Mon Aug 16 17:00:00 MST 2010 50 Sun Aug 15 17:00:00 MST 2010 305 Fri Aug 13 17:00:00 MST 2010 30 Thu Aug 12 17:00:00 MST 2010 110 Wed Aug 11 17:00:00 MST 2010 420 Tue Aug 10 17:00:00 MST 2010 350 Mon Aug 9 17:00:00 MST 2010 70 Sun Aug 8 17:00:00 MST 2010 75 Fri Aug 6 17:00:00 MST 2010 90 Thu Aug 5 17:00:00 MST 2010 30 Tue Aug 3 17:00:00 MST 2010 22 Mon Aug 2 17:00:00 MST 2010 35 Sat Jul 31 17:00:00 MST 2010 100 Thu Jul 29 17:00:00 MST 2010 115 Wed Jul 28 17:00:00 MST 2010 123 Tue Jul 27 17:00:00 MST 2010 10 Sun Jul 25 17:00:00 MST 2010 265 Sat Jul 24 17:00:00 MST 2010 -195 Fri Jul 23 17:00:00 MST 2010 10 Thu Jul 22 17:00:00 MST 2010 70 Wed Jul 21 17:00:00 MST 2010 50 Mon Jul 19 17:00:00 MST 2010 50 Sat Jul 17 17:00:00 MST 2010 50 Thu Jul 15 17:00:00 MST 2010 110 Wed Jul 14 17:00:00 MST 2010 20 Tue Jul 13 17:00:00 MST 2010 10 Mon Jul 12 17:00:00 MST 2010 38 Sat Jul 10 17:00:00 MST 2010 40 Thu Jul 8 17:00:00 MST 2010 40 Wed Jul 7 17:00:00 MST 2010 10 Tue Jul 6 17:00:00 MST 2010 173 Mon Jul 5 17:00:00 MST 2010 50 Sun Jul 4 17:00:00 MST 2010 50 Sat Jul 3 17:00:00 MST 2010 40 Fri Jul 2 17:00:00 MST 2010 10 Thu Jul 1 17:00:00 MST 2010 200 Wed Jun 30 17:00:00 MST 2010 130 Tue Jun 29 17:00:00 MST 2010 40 Mon Jun 28 17:00:00 MST 2010 70 Sun Jun 27 17:00:00 MST 2010 40 Sat Jun 26 17:00:00 MST 2010 40 Thu Jun 24 17:00:00 MST 2010 10 Tue Jun 22 17:00:00 MST 2010 55 Mon Jun 21 17:00:00 MST 2010 10 Sun Jun 20 17:00:00 MST 2010 70 Sat Jun 19 17:00:00 MST 2010 18 Fri Jun 18 17:00:00 MST 2010 30 Thu Jun 17 17:00:00 MST 2010 175 Wed Jun 16 17:00:00 MST 2010 60 Tue Jun 15 17:00:00 MST 2010 90 Mon Jun 14 17:00:00 MST 2010 60 Sun Jun 13 17:00:00 MST 2010 10 Sat Jun 12 17:00:00 MST 2010 20 Fri Jun 11 17:00:00 MST 2010 20 Sun Jun 6 17:00:00 MST 2010 10 Sat Jun 5 17:00:00 MST 2010 55 Tue Jun 1 17:00:00 MST 2010 45 Mon May 31 17:00:00 MST 2010 30 Sun May 30 17:00:00 MST 2010 10