datasetutilities.html

jfreechart1。0。2的api。

<FONT color="green">272</FONT>         * @param source  the source dataset (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.272"></a>
<FONT color="green">273</FONT>         * @param key  the key to represent the aggregated items.<a name="line.273"></a>
<FONT color="green">274</FONT>         * @param minimumPercent  the percent threshold (ten percent is 0.10).<a name="line.274"></a>
<FONT color="green">275</FONT>         * @param minItems  only aggregate low values if there are at least this <a name="line.275"></a>
<FONT color="green">276</FONT>         *                  many.<a name="line.276"></a>
<FONT color="green">277</FONT>         * <a name="line.277"></a>
<FONT color="green">278</FONT>         * @return The pie dataset with (possibly) aggregated items.<a name="line.278"></a>
<FONT color="green">279</FONT>         */<a name="line.279"></a>
<FONT color="green">280</FONT>        public static PieDataset createConsolidatedPieDataset(PieDataset source,<a name="line.280"></a>
<FONT color="green">281</FONT>                                                              Comparable key,<a name="line.281"></a>
<FONT color="green">282</FONT>                                                              double minimumPercent,<a name="line.282"></a>
<FONT color="green">283</FONT>                                                              int minItems) {<a name="line.283"></a>
<FONT color="green">284</FONT>            <a name="line.284"></a>
<FONT color="green">285</FONT>            DefaultPieDataset result = new DefaultPieDataset();<a name="line.285"></a>
<FONT color="green">286</FONT>            double total = DatasetUtilities.calculatePieDatasetTotal(source);<a name="line.286"></a>
<FONT color="green">287</FONT>    <a name="line.287"></a>
<FONT color="green">288</FONT>            //  Iterate and find all keys below threshold percentThreshold<a name="line.288"></a>
<FONT color="green">289</FONT>            List keys = source.getKeys();<a name="line.289"></a>
<FONT color="green">290</FONT>            ArrayList otherKeys = new ArrayList();<a name="line.290"></a>
<FONT color="green">291</FONT>            Iterator iterator = keys.iterator();<a name="line.291"></a>
<FONT color="green">292</FONT>            while (iterator.hasNext()) {<a name="line.292"></a>
<FONT color="green">293</FONT>                Comparable currentKey = (Comparable) iterator.next();<a name="line.293"></a>
<FONT color="green">294</FONT>                Number dataValue = source.getValue(currentKey);<a name="line.294"></a>
<FONT color="green">295</FONT>                if (dataValue != null) {<a name="line.295"></a>
<FONT color="green">296</FONT>                    double value = dataValue.doubleValue();<a name="line.296"></a>
<FONT color="green">297</FONT>                    if (value / total &lt; minimumPercent) {<a name="line.297"></a>
<FONT color="green">298</FONT>                        otherKeys.add(currentKey);<a name="line.298"></a>
<FONT color="green">299</FONT>                    }<a name="line.299"></a>
<FONT color="green">300</FONT>                }<a name="line.300"></a>
<FONT color="green">301</FONT>            }<a name="line.301"></a>
<FONT color="green">302</FONT>    <a name="line.302"></a>
<FONT color="green">303</FONT>            //  Create new dataset with keys above threshold percentThreshold<a name="line.303"></a>
<FONT color="green">304</FONT>            iterator = keys.iterator();<a name="line.304"></a>
<FONT color="green">305</FONT>            double otherValue = 0;<a name="line.305"></a>
<FONT color="green">306</FONT>            while (iterator.hasNext()) {<a name="line.306"></a>
<FONT color="green">307</FONT>                Comparable currentKey = (Comparable) iterator.next();<a name="line.307"></a>
<FONT color="green">308</FONT>                Number dataValue = source.getValue(currentKey);<a name="line.308"></a>
<FONT color="green">309</FONT>                if (dataValue != null) {<a name="line.309"></a>
<FONT color="green">310</FONT>                    if (otherKeys.contains(currentKey) <a name="line.310"></a>
<FONT color="green">311</FONT>                        &amp;&amp; otherKeys.size() &gt;= minItems) {<a name="line.311"></a>
<FONT color="green">312</FONT>                        //  Do not add key to dataset<a name="line.312"></a>
<FONT color="green">313</FONT>                        otherValue += dataValue.doubleValue();<a name="line.313"></a>
<FONT color="green">314</FONT>                    }<a name="line.314"></a>
<FONT color="green">315</FONT>                    else {<a name="line.315"></a>
<FONT color="green">316</FONT>                        //  Add key to dataset<a name="line.316"></a>
<FONT color="green">317</FONT>                        result.setValue(currentKey, dataValue);<a name="line.317"></a>
<FONT color="green">318</FONT>                    }<a name="line.318"></a>
<FONT color="green">319</FONT>                }<a name="line.319"></a>
<FONT color="green">320</FONT>            }<a name="line.320"></a>
<FONT color="green">321</FONT>            //  Add other category if applicable<a name="line.321"></a>
<FONT color="green">322</FONT>            if (otherKeys.size() &gt;= minItems) {<a name="line.322"></a>
<FONT color="green">323</FONT>                result.setValue(key, otherValue);<a name="line.323"></a>
<FONT color="green">324</FONT>            }<a name="line.324"></a>
<FONT color="green">325</FONT>            return result;<a name="line.325"></a>
<FONT color="green">326</FONT>        }<a name="line.326"></a>
<FONT color="green">327</FONT>    <a name="line.327"></a>
<FONT color="green">328</FONT>        /**<a name="line.328"></a>
<FONT color="green">329</FONT>         * Creates a {@link CategoryDataset} that contains a copy of the data in an<a name="line.329"></a>
<FONT color="green">330</FONT>         * array (instances of &lt;code&gt;Double&lt;/code&gt; are created to represent the <a name="line.330"></a>
<FONT color="green">331</FONT>         * data items).<a name="line.331"></a>
<FONT color="green">332</FONT>         * &lt;p&gt;<a name="line.332"></a>
<FONT color="green">333</FONT>         * Row and column keys are created by appending 0, 1, 2, ... to the <a name="line.333"></a>
<FONT color="green">334</FONT>         * supplied prefixes.<a name="line.334"></a>
<FONT color="green">335</FONT>         *<a name="line.335"></a>
<FONT color="green">336</FONT>         * @param rowKeyPrefix  the row key prefix.<a name="line.336"></a>
<FONT color="green">337</FONT>         * @param columnKeyPrefix  the column key prefix.<a name="line.337"></a>
<FONT color="green">338</FONT>         * @param data  the data.<a name="line.338"></a>
<FONT color="green">339</FONT>         *<a name="line.339"></a>
<FONT color="green">340</FONT>         * @return The dataset.<a name="line.340"></a>
<FONT color="green">341</FONT>         */<a name="line.341"></a>
<FONT color="green">342</FONT>        public static CategoryDataset createCategoryDataset(String rowKeyPrefix,<a name="line.342"></a>
<FONT color="green">343</FONT>                                                            String columnKeyPrefix,<a name="line.343"></a>
<FONT color="green">344</FONT>                                                            double[][] data) {<a name="line.344"></a>
<FONT color="green">345</FONT>    <a name="line.345"></a>
<FONT color="green">346</FONT>            DefaultCategoryDataset result = new DefaultCategoryDataset();<a name="line.346"></a>
<FONT color="green">347</FONT>            for (int r = 0; r &lt; data.length; r++) {<a name="line.347"></a>
<FONT color="green">348</FONT>                String rowKey = rowKeyPrefix + (r + 1);<a name="line.348"></a>
<FONT color="green">349</FONT>                for (int c = 0; c &lt; data[r].length; c++) {<a name="line.349"></a>
<FONT color="green">350</FONT>                    String columnKey = columnKeyPrefix + (c + 1);<a name="line.350"></a>
<FONT color="green">351</FONT>                    result.addValue(new Double(data[r][c]), rowKey, columnKey);<a name="line.351"></a>
<FONT color="green">352</FONT>                }<a name="line.352"></a>
<FONT color="green">353</FONT>            }<a name="line.353"></a>
<FONT color="green">354</FONT>            return result;<a name="line.354"></a>
<FONT color="green">355</FONT>    <a name="line.355"></a>
<FONT color="green">356</FONT>        }<a name="line.356"></a>
<FONT color="green">357</FONT>    <a name="line.357"></a>
<FONT color="green">358</FONT>        /**<a name="line.358"></a>
<FONT color="green">359</FONT>         * Creates a {@link CategoryDataset} that contains a copy of the data in <a name="line.359"></a>
<FONT color="green">360</FONT>         * an array.<a name="line.360"></a>
<FONT color="green">361</FONT>         * &lt;p&gt;<a name="line.361"></a>
<FONT color="green">362</FONT>         * Row and column keys are created by appending 0, 1, 2, ... to the <a name="line.362"></a>
<FONT color="green">363</FONT>         * supplied prefixes.<a name="line.363"></a>
<FONT color="green">364</FONT>         *<a name="line.364"></a>
<FONT color="green">365</FONT>         * @param rowKeyPrefix  the row key prefix.<a name="line.365"></a>
<FONT color="green">366</FONT>         * @param columnKeyPrefix  the column key prefix.<a name="line.366"></a>
<FONT color="green">367</FONT>         * @param data  the data.<a name="line.367"></a>
<FONT color="green">368</FONT>         *<a name="line.368"></a>
<FONT color="green">369</FONT>         * @return The dataset.<a name="line.369"></a>
<FONT color="green">370</FONT>         */<a name="line.370"></a>
<FONT color="green">371</FONT>        public static CategoryDataset createCategoryDataset(String rowKeyPrefix,<a name="line.371"></a>
<FONT color="green">372</FONT>                                                            String columnKeyPrefix,<a name="line.372"></a>
<FONT color="green">373</FONT>                                                            Number[][] data) {<a name="line.373"></a>
<FONT color="green">374</FONT>    <a name="line.374"></a>
<FONT color="green">375</FONT>            DefaultCategoryDataset result = new DefaultCategoryDataset();<a name="line.375"></a>
<FONT color="green">376</FONT>            for (int r = 0; r &lt; data.length; r++) {<a name="line.376"></a>
<FONT color="green">377</FONT>                String rowKey = rowKeyPrefix + (r + 1);<a name="line.377"></a>
<FONT color="green">378</FONT>                for (int c = 0; c &lt; data[r].length; c++) {<a name="line.378"></a>
<FONT color="green">379</FONT>                    String columnKey = columnKeyPrefix + (c + 1);<a name="line.379"></a>
<FONT color="green">380</FONT>                    result.addValue(data[r][c], rowKey, columnKey);<a name="line.380"></a>
<FONT color="green">381</FONT>                }<a name="line.381"></a>
<FONT color="green">382</FONT>            }<a name="line.382"></a>
<FONT color="green">383</FONT>            return result;<a name="line.383"></a>
<FONT color="green">384</FONT>    <a name="line.384"></a>
<FONT color="green">385</FONT>        }<a name="line.385"></a>
<FONT color="green">386</FONT>    <a name="line.386"></a>
<FONT color="green">387</FONT>        /**<a name="line.387"></a>
<FONT color="green">388</FONT>         * Creates a {@link CategoryDataset} that contains a copy of the data in <a name="line.388"></a>
<FONT color="green">389</FONT>         * an array (instances of &lt;code&gt;Double&lt;/code&gt; are created to represent the <a name="line.389"></a>
<FONT color="green">390</FONT>         * data items).<a name="line.390"></a>
<FONT color="green">391</FONT>         * &lt;p&gt;<a name="line.391"></a>
<FONT color="green">392</FONT>         * Row and column keys are taken from the supplied arrays.<a name="line.392"></a>
<FONT color="green">393</FONT>         *<a name="line.393"></a>
<FONT color="green">394</FONT>         * @param rowKeys  the row keys (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.394"></a>
<FONT color="green">395</FONT>         * @param columnKeys  the column keys (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.395"></a>
<FONT color="green">396</FONT>         * @param data  the data.<a name="line.396"></a>
<FONT color="green">397</FONT>         *<a name="line.397"></a>
<FONT color="green">398</FONT>         * @return The dataset.<a name="line.398"></a>
<FONT color="green">399</FONT>         */<a name="line.399"></a>
<FONT color="green">400</FONT>        public static CategoryDataset createCategoryDataset(Comparable[] rowKeys,<a name="line.400"></a>
<FONT color="green">401</FONT>                                                            Comparable[] columnKeys,<a name="line.401"></a>
<FONT color="green">402</FONT>                                                            double[][] data) {<a name="line.402"></a>
<FONT color="green">403</FONT>    <a name="line.403"></a>
<FONT color="green">404</FONT>            // check arguments...<a name="line.404"></a>
<FONT color="green">405</FONT>            if (rowKeys == null) {<a name="line.405"></a>
<FONT color="green">406</FONT>                throw new IllegalArgumentException("Null 'rowKeys' argument.");<a name="line.406"></a>
<FONT color="green">407</FONT>            }<a name="line.407"></a>
<FONT color="green">408</FONT>            if (columnKeys == null) {<a name="line.408"></a>