## FAQs

You can use the function flip to flip any array along one axis: **Aa = flip(A,2);** This will work for both a gray-scale and an RGB image. This is equivalent to the following indexing expression for a 3D array (such as an RGB image):

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How do you reverse the Y axis in Matlab Imshow? ›
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By default, the 'imshow' function inverts the y-axis direction when the image is displayed on an axes by **setting the 'YDir' property to 'reverse.** **'** To revert the y-axis direction after calling 'imshow', set the 'YDir' property to 'normal'. Then, to preserve the orientation of the image, flip the image using 'flip'.

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How do you find the image of a point in the Y axis? ›
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Answer: The image of a point (-8,5) with respect to the y-axis can be obtained by **reversing the sign of its x-coordinate while keeping the y-coordinate unchanged**. Therefore, the image of (-8,5) with respect to the y-axis is (8,5).

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What is the axis equal in Matlab? ›
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axis equal **sets the aspect ratio so that the data units are the same in every direction**. The aspect ratio of the x-, y-, and z-axis is adjusted automatically according to the range of data units in the x, y, and z directions. axis image is the same as axis equal except that the plot box fits tightly around the data.

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How do you flip over the y-axis? ›
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To reflect an equation over the y-axis, simply **multiply the input variable by -1**: y = f ( x ) → y = f ( − x ) .

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How do I flip an image on the y-axis in Word? ›
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**Go to the “Format” tab.** **Choose the “Rotate” option.** **Select either “Flip Horizontal” or “Flip Vertical” from the drop-down menu**. Word will automatically flip the image.

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How do I reverse the Y-axis in Matplotlib? ›
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Most common method is by using invert_xaxis() and invert_yaxis() for the axes objects. Other than that we can also use xlim() and ylim(), and axis() methods for the pyplot object. To invert X-axis and Y-axis, we can **use invert_xaxis() and invert_yaxis() function**.

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How do you rotate the Y-axis in Matlab? ›
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**R = roty( ang )** creates a 3-by-3 matrix used to rotate a 3-by-1 vector or 3-by-N matrix of vectors around the y-axis by ang degrees.

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When an image is reflected over the Y `- axis How are the coordinates of the image related to the coordinates of the pre image? ›
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When you reflect a point across the y-axis, **the y-coordinate remains the same**, but the x-coordinate is taken to be the additive inverse. The reflection of point (x, y) across the y-axis is (-x, y).

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What is the y-coordinate of the image? ›
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Image or graphics coordinates

The origin of the image or graphics coordinate system is the bottom-left corner of an image. The x coordinate extends from left to right; the y coordinate **extends upward**. Integers give the edges of pixels, like grid lines on graph paper.

Reflecting across the y-axis, **the image isn't moving anywhere vertically, so the y-values stay the same**. The x-values all switch signs. Let's take one point, like (6,3). Reflecting that across the y-axis gives us (-6,3).

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How do I change the axis direction in MATLAB? ›
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Reverse Axis Direction

Control the direction of increasing values along the x-axis and y-axis by **setting the XDir and YDir properties of the Axes object**. Set these properties to either 'reverse' or 'normal' (the default). Use the gca command to access the Axes object.

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How do I change the axis value in MATLAB? ›
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You can change the x- or y-axis units by **right-clicking the mouse on the axis label or by right-clicking on the plot and selecting Analysis Parameters**.

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What is the Y-axis line in MATLAB? ›
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**yline( y ) creates a horizontal line at one or more y-coordinates in the current axes**. For example, yline(2) creates a line at y=2 . yline( y , LineSpec ) specifies the line style, the line color, or both. For example, yline([12 20 33],'--b') creates three dashed blue lines.

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How do you flip a linear function over the y-axis? ›
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A vertical flip over the y axis would look like: **f(x) = f(-x)**. This would change all of the x values to a negative number. An example of this can be seen here. The parent function in this image is green and the reflection is the blue line.

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How do you rotate the y-axis in Matlab? ›
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**R = roty( ang )** creates a 3-by-3 matrix used to rotate a 3-by-1 vector or 3-by-N matrix of vectors around the y-axis by ang degrees.

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How do you flip an image 90 degrees in Matlab? ›
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**B = rot90( A )** rotates array A counterclockwise by 90 degrees. For multidimensional arrays, rot90 rotates in the plane formed by the first and second dimensions. B = rot90( A , k ) rotates array A counterclockwise by k*90 degrees, where k is an integer.