Matlab imagesc axis scale

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You may receive emails, depending on your notification preferences. How do you make the x-axis in imagesc using datetime values? Hannah on 27 Sep Vote 0. Commented: Andrew McLean on 23 Mar at I have data that I wish to display using imagesc with the y-axis being a unit of distance and the x-axis being a datetime array, however, I receive an error when I do this.

Any help would be appreciated. For example:. Throws the following error:. Error using image. Image XData and YData must be vectors. Error in imagesc line Answers 3. KSSV on 27 Sep Cancel Copy to Clipboard. I'm aware that you can manually change the tick marks on axis labels, but the benefit of the datetime function is that it changes as you zoom, hence my desire to use it. If I wasn't fussed about zooming, I'd use datetick.

Walter Roberson on 27 Sep In the case where the x axis is to be a duration array rather than a datetime array :. First, plot something using an x axis in the same time units as you want the imagesc to be labeled with. Modify the "seoonds" to the appropriate time measure.Documentation Help Center. Each element of C specifies the color for one pixel of the image. The resulting image is an m -by- n grid of pixels where m is the number of rows and n is the number of columns in C. The row and column indices of the elements determine the centers of the corresponding pixels.

Use x and y to specify the locations of the corners corresponding to C 1,1 and C m,n. To specify both corners, set x and y as two-element vectors. To specify the first corner and let imagesc determine the other, set x and y as scalar values. The image is stretched and oriented as applicable. This syntax is the low-level version of imagesc C.

This syntax is the low-level version of imagesc x,y,C. You can specify name-value pair arguments after any of the input argument combinations in the previous syntaxes.

For a list of image properties and descriptions, see Image Properties. Specify clims as a two-element vector of the form [cmin cmax]where values less than or equal to cmin map to the first color in the colormap and values greater than or equal to cmax map to the last color in the colormap. Specify clims after name-value pair arguments. Specify the axes as the first input argument. Use im to set properties of the image after it is created. You can specify this output with any of the input argument combinations in the previous syntaxes.

Create matrix C. Display an image of the data in C. Add a colorbar to the graph to show the current colormap. By default, imagesc scales the color limits so that image uses the full range of the colormap, where the smallest value in C maps to the first color in the colormap and the largest value maps to the last color.

Place the image so that it lies between 5 and 8 on the x -axis and between 3 and 6 on the y -axis. Notice that the pixel corresponding to C 1,1 is centered over the point 5,3. The pixel corresponding to C 3,4 is centered over the point 8,6. Create C as an array of data values. Create an image of C and set the color limits so that values of 4 or less map to the first color in the colormap and values of 18 or more map to the last color in the colormap.

Display a colorbar to show how the data values map into the colormap. Create an image and return the image object, im. Then, make the image semitransparent by setting the AlphaData property of the image object. Create a surface plot. Then, add an image under the surface. Image color data, specified as a vector or a matrix.Sign in to comment. Sign in to answer this question. Unable to complete the action because of changes made to the page.

Set axis limits with Matplotlib in Python

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matlab imagesc axis scale

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Open Mobile Search. Trial software. You are now following this question You will see updates in your activity feed. You may receive emails, depending on your notification preferences. Vote 0. Accepted Answer: owr. Hi folks. Im hoping some of you image processing gurus know how to do this with little effort. I have 2 matrices with similar, but not equivalent, data ranges. If I use imagesc, each visual uses an independent scale based on the respective matrices' data range.

For example, c1 ranges from 0 to I'd like to graph each independently in different figures but use a common color scale that ranges from 0 to 3. Accepted Answer. Vote 1. Cancel Copy to Clipboard.Documentation Help Center. Axes properties control the appearance and behavior of an Axes object. By changing property values, you can modify certain aspects of the axes.

Use dot notation to query and set properties. Font name, specified as a supported font name or 'FixedWidth'. To display and print text properly, you must choose a font that your system supports. The default font depends on your operating system and locale. To use a fixed-width font that looks good in any locale, use 'FixedWidth'. The fixed-width font relies on the root FixedWidthFontName property. Setting the root FixedWidthFontName property causes an immediate update of the display to use the new font.

Scaling axis using imagesc

Character thickness, specified as 'normal' or 'bold'. Not all fonts have a bold weight. Therefore, specifying a bold font weight can still result in the normal font weight. Font size, specified as a scalar numeric value. The font size affects the title, axis labels, and tick labels.

How do you make the x-axis in imagesc using datetime values?

It also affects any legends or colorbars associated with the axes. The default font size depends on the specific operating system and locale. By default, the font size is measured in points. To change the units, set the FontUnits property. To specify a different font size, set the FontSize property for the Legend or Colorbar object instead. Example: ax. If you resize the axes to be smaller than the default size, the font size might scale down to improve readability and layout.

Do not scale the font size as the axes size changes. To specify the font size, set the FontSize property. Character slant, specified as 'normal' or 'italic'. Not all fonts have both font styles. Therefore, the italic font might look the same as the normal font. Scale factor for the label font size, specified as a numeric value greater than 0.

The scale factor is applied to the value of the FontSize property to determine the font size for the x -axis, y -axis, and z -axis labels. Scale factor for the title font size, specified as a numeric value greater than 0.Sign in to answer this question. Sign in to comment. Unable to complete the action because of changes made to the page.

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You may receive emails, depending on your notification preferences. MathWorks Support Team on 29 Jul Vote 0. Answered: Rishi Kumar on 7 Jun The y-axis runs from the top of the image to the bottom. I would like to reverse the y-axis so that it starts at the bottom of the image and runs to to the top. Accepted Answer. Vote Cancel Copy to Clipboard.

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matlab imagesc axis scale

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I have a 15x15 image of a grid of numbers which I have shown using imagesc. However, the axis goes up to in both directions, when I only want it to go up to I tried:. The problem is, I presume, that although your image shows 15 numbers along in each axes, the total size of your image in pixels is x - and this is what imagesc is using.

So, what you really have is an image with 15 x 15 blocks of 30 x 30 pixels. Learn more. How to change axis scale on imagesc in Matlab Ask Question. Asked 6 years, 4 months ago. Active 1 year, 1 month ago.

Viewed 8k times. All I want to do is divide the x and y axes by 30! Cris Luengo Can you provide your code? Active Oldest Votes. Cool thank you. Do I do this before calling imagesc? Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name.

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matlab imagesc axis scale

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matlab imagesc axis scale

Yi on 17 Sep Vote 0. Commented: Peter Jack on 6 Dec


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