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    <p>To initialize data in Table you have to redefine data function, rowCount and clumnCount along with constructor of Model . suppose you have data int mydataarray[r][c] that is initialized in constructor. </p> <pre><code> TableModel::TableModel(int r,int c, double **initialdata) { R = r; C = c; mydataarray= initialdata; } QVariant TableModel::data(const QModelIndex &amp;index, int role) const { switch(role) { case Qt::DisplayRole: if(index.column()==0) { return QString::number(maydataarray[index.row()][index.column()]); } break; } </code></pre> <p>To set number of rows and column redefine </p> <pre><code>int TableModel::rowCount(const QModelIndex &amp;parent= QModelIndex()) const { return R;//R is number of initial rows } int TableModel::columnCount(const QModelIndex &amp;parent= QModelIndex()) const { return C;//C is number of initial columns } </code></pre> <p>in initialize function that actually you can use to modify but you have to insert rows and columns in model if they are exceeding the initial r and c </p> <pre><code> void TableModel::Initialize(double **a, int r, int c) { QModelIndex m = createIndex(0,0); if(r&gt;this-&gt;rowCount(m)||c&gt;this-&gt;columnCount(m)) { QMessageBox m1; m1.setText("Exciding r/c "+ QString::number(m.row())+QString::number(m.column())); m1.exec(); return;//add logic to insert exceeding rows and columns here before calling dataChange() function } mydataarray =a; QModelIndex n = createIndex(r-1,c-1); this-&gt;dataChanged(createIndex(0,0),n); } </code></pre> <p>refer <a href="http://doc.qt.digia.com/4.7/modelview.html#2-1-a-read-only-table" rel="nofollow">this</a> for further </p>
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    1. POInitialising data into custom model from QAbstractTableModel in Qt?
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    1. COAFAIK ::data() is called by QTableView to display data for each cell. But when I am calling index.isValid() in first line inside ::data() it is returning false. That is why it is not displaying anything. Hence I thought my method of initialising is missing something. Probably something related to index. The ::data() that you have shown is somewhat similar to mine only that there are some more checks. It is returning in the first line itself because the index is not valid...
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    2. COedited the question, please let me know if this clears the confusion. And yes I did refer that link. But as you can see above I am getting invalid index's. I dont understand the reason for that.
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    3. COI cannot understand how recreating array inside MyModel can help me, nevertheless I will try & let you know. Also if it helps I found out by debugging that the index has a NULL pointer for model & the row & column values are also 0.
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

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