public StringBuilder toString(StringBuilder sb, String[] fs, long idx) {
Vec vecs[] = vecs();
for (int c = 0; c < fs.length; c++) {
Vec vec = vecs[c];
if (vec.isEnum()) {
String s = "----------";
if (!vec.isNA(idx)) {
int x = (int) vec.at8(idx);
if (x >= 0 && x < vec._domain.length) s = vec._domain[x];
}
sb.append(String.format(fs[c], s));
} else if (vec.isInt()) {
if (vec.isNA(idx)) {
Chunk C = vec.elem2BV(0); // 1st Chunk
int len = C.pformat_len0(); // Printable width
for (int i = 0; i < len; i++) sb.append('-');
} else {
try {
sb.append(String.format(fs[c], vec.at8(idx)));
} catch (IllegalFormatException ife) {
System.out.println("Format: " + fs[c] + " col=" + c + " not for ints");
ife.printStackTrace();
}
}
} else {
sb.append(String.format(fs[c], vec.at(idx)));
if (vec.isNA(idx)) sb.append(' ');
}
sb.append(' '); // Column seperator
}
sb.append('\n');
return sb;
}
@Test
public void test() {
Frame frame = null;
try {
Futures fs = new Futures();
Random random = new Random();
Vec[] vecs = new Vec[1];
AppendableVec vec = new AppendableVec(Vec.newKey(), Vec.T_NUM);
for (int i = 0; i < 2; i++) {
NewChunk chunk = new NewChunk(vec, i);
for (int r = 0; r < 1000; r++) chunk.addNum(random.nextInt(1000));
chunk.close(i, fs);
}
vecs[0] = vec.layout_and_close(fs);
fs.blockForPending();
frame = new Frame(Key.<Frame>make(), null, vecs);
// Make sure we test the multi-chunk case
vecs = frame.vecs();
assert vecs[0].nChunks() > 1;
long rows = frame.numRows();
Vec v = vecs[0];
double min = Double.POSITIVE_INFINITY, max = Double.NEGATIVE_INFINITY, mean = 0, sigma = 0;
for (int r = 0; r < rows; r++) {
double d = v.at(r);
if (d < min) min = d;
if (d > max) max = d;
mean += d;
}
mean /= rows;
for (int r = 0; r < rows; r++) {
double d = v.at(r);
sigma += (d - mean) * (d - mean);
}
sigma = Math.sqrt(sigma / (rows - 1));
double epsilon = 1e-9;
assertEquals(max, v.max(), epsilon);
assertEquals(min, v.min(), epsilon);
assertEquals(mean, v.mean(), epsilon);
assertEquals(sigma, v.sigma(), epsilon);
} finally {
if (frame != null) frame.delete();
}
}