Problem in storing the dynamic data in NSMutableArray?
<p>I want to develop an application in which firstly i was develop an structure code for storing X and y axis.</p>

<p>struct TCo_ordinates
{
    float x;
    float y;
};
.
Then in drawRect method i generating an object of structure like.</p>

<pre><code>struct TCo_ordinates *tCoordianates; 
</code></pre>

<p>Now I drawing the graph of Y-Axis  its code is.</p>

<pre><code>    fltX1 = 30;
fltY1 = 5;
fltX2 = fltX1;
fltY2 = 270;
CGContextMoveToPoint(ctx, fltX1, fltY1);
CGContextAddLineToPoint(ctx, fltX2, fltY2);
NSArray *hoursInDays = [[NSArray alloc] initWithObjects:@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"10",@"11",@"12", nil];
for(int intIndex = 0  ; intIndex &lt; [hoursInDays count] ; fltY2-=20, intIndex++)
{   
    CGContextSetRGBStrokeColor(ctx, 2, 2, 2, 1); 
    //CGContextSetRGBStrokeColor(ctx, 1.0f/255.0f, 1.0f/255.0f, 1.0f/255.0f, 1.0f);   
    CGContextMoveToPoint(ctx, fltX1-3 , fltY2-40);
    CGContextAddLineToPoint(ctx, fltX1+3, fltY2-40);
    CGContextSelectFont(ctx, "Helvetica", 14.0, kCGEncodingMacRoman);
    CGContextSetTextDrawingMode(ctx, kCGTextFill);
    CGContextSetRGBFillColor(ctx, 0, 255, 255, 1);
    CGAffineTransform xform = CGAffineTransformMake(
                                                    1.0,  0.0,
                                                    0.0, -1.0,
                                                    0.0,  0.0);
    CGContextSetTextMatrix(ctx, xform);
    const char *arrayDataForYAxis = [[hoursInDays objectAtIndex:intIndex] UTF8String];
    float x1 = fltX1-23;
    float y1 = fltY2-37;
    CGContextShowTextAtPoint(ctx, x1, y1, arrayDataForYAxis, strlen(arrayDataForYAxis));
    CGContextStrokePath(ctx);
</code></pre>

<p>Now i want to store generated the values of x1 and y1 in NSMutableArray dynamically, for that i was written the code.</p>

<pre><code>NSMutableArray *yAxisCoordinates = [[NSMutableArray alloc] autorelease];
    for(int yObject = 0; yObject &lt; intIndex; yObject++)
    {
        [yAxisCoordinates insertObject:(tCoordianates-&gt;x = x1,tCoordianates-&gt;y = y1) atIndex:yObject];  

    }
</code></pre>

<p>But it didn't working. How i store the x1 and y1 values in yAxisCoordinates object.
The above code is correct????????????? </p>
