datautilities.html

jfreechart1。0。2的api。

<FONT color="green">117</FONT>    <a name="line.117"></a>
<FONT color="green">118</FONT>        /**<a name="line.118"></a>
<FONT color="green">119</FONT>         * Constructs an array of arrays of &lt;code&gt;Number&lt;/code&gt; objects from a <a name="line.119"></a>
<FONT color="green">120</FONT>         * corresponding structure containing &lt;code&gt;double&lt;/code&gt; primitives.<a name="line.120"></a>
<FONT color="green">121</FONT>         *<a name="line.121"></a>
<FONT color="green">122</FONT>         * @param data  the data (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.122"></a>
<FONT color="green">123</FONT>         *<a name="line.123"></a>
<FONT color="green">124</FONT>         * @return An array of &lt;code&gt;Double&lt;/code&gt;.<a name="line.124"></a>
<FONT color="green">125</FONT>         */<a name="line.125"></a>
<FONT color="green">126</FONT>        public static Number[][] createNumberArray2D(double[][] data) {<a name="line.126"></a>
<FONT color="green">127</FONT>            if (data == null) {<a name="line.127"></a>
<FONT color="green">128</FONT>                throw new IllegalArgumentException("Null 'data' argument.");   <a name="line.128"></a>
<FONT color="green">129</FONT>            }<a name="line.129"></a>
<FONT color="green">130</FONT>            int l1 = data.length;<a name="line.130"></a>
<FONT color="green">131</FONT>            Number[][] result = new Number[l1][];<a name="line.131"></a>
<FONT color="green">132</FONT>            for (int i = 0; i &lt; l1; i++) {<a name="line.132"></a>
<FONT color="green">133</FONT>                result[i] = createNumberArray(data[i]);<a name="line.133"></a>
<FONT color="green">134</FONT>            }<a name="line.134"></a>
<FONT color="green">135</FONT>            return result;<a name="line.135"></a>
<FONT color="green">136</FONT>        }<a name="line.136"></a>
<FONT color="green">137</FONT>    <a name="line.137"></a>
<FONT color="green">138</FONT>        /**<a name="line.138"></a>
<FONT color="green">139</FONT>         * Returns a {@link KeyedValues} instance that contains the cumulative <a name="line.139"></a>
<FONT color="green">140</FONT>         * percentage values for the data in another {@link KeyedValues} instance.<a name="line.140"></a>
<FONT color="green">141</FONT>         * &lt;p&gt;<a name="line.141"></a>
<FONT color="green">142</FONT>         * The percentages are values between 0.0 and 1.0 (where 1.0 = 100%).<a name="line.142"></a>
<FONT color="green">143</FONT>         *<a name="line.143"></a>
<FONT color="green">144</FONT>         * @param data  the data (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.144"></a>
<FONT color="green">145</FONT>         *<a name="line.145"></a>
<FONT color="green">146</FONT>         * @return The cumulative percentages.<a name="line.146"></a>
<FONT color="green">147</FONT>         */<a name="line.147"></a>
<FONT color="green">148</FONT>        public static KeyedValues getCumulativePercentages(KeyedValues data) {<a name="line.148"></a>
<FONT color="green">149</FONT>            if (data == null) {<a name="line.149"></a>
<FONT color="green">150</FONT>                throw new IllegalArgumentException("Null 'data' argument.");   <a name="line.150"></a>
<FONT color="green">151</FONT>            }<a name="line.151"></a>
<FONT color="green">152</FONT>            DefaultKeyedValues result = new DefaultKeyedValues();<a name="line.152"></a>
<FONT color="green">153</FONT>            double total = 0.0;<a name="line.153"></a>
<FONT color="green">154</FONT>            for (int i = 0; i &lt; data.getItemCount(); i++) {<a name="line.154"></a>
<FONT color="green">155</FONT>                Number v = data.getValue(i);<a name="line.155"></a>
<FONT color="green">156</FONT>                if (v != null) {<a name="line.156"></a>
<FONT color="green">157</FONT>                    total = total + v.doubleValue();<a name="line.157"></a>
<FONT color="green">158</FONT>                }<a name="line.158"></a>
<FONT color="green">159</FONT>            }<a name="line.159"></a>
<FONT color="green">160</FONT>            double runningTotal = 0.0;<a name="line.160"></a>
<FONT color="green">161</FONT>            for (int i = 0; i &lt; data.getItemCount(); i++) {<a name="line.161"></a>
<FONT color="green">162</FONT>                Number v = data.getValue(i);<a name="line.162"></a>
<FONT color="green">163</FONT>                if (v != null) {<a name="line.163"></a>
<FONT color="green">164</FONT>                    runningTotal = runningTotal + v.doubleValue();<a name="line.164"></a>
<FONT color="green">165</FONT>                }<a name="line.165"></a>
<FONT color="green">166</FONT>                result.addValue(data.getKey(i), new Double(runningTotal / total));<a name="line.166"></a>
<FONT color="green">167</FONT>            }<a name="line.167"></a>
<FONT color="green">168</FONT>            return result;<a name="line.168"></a>
<FONT color="green">169</FONT>        }<a name="line.169"></a>
<FONT color="green">170</FONT>    <a name="line.170"></a>
<FONT color="green">171</FONT>    }<a name="line.171"></a>




























































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