Why can t the quadrant order of the axes be reversed by 5

It's the rule, it's the rule.

Origin. There is such a story in the legend:

One day, Descartes (1596-1650, French philosopher, mathematician, and physicist) was sick and bedridden, but his mind never rested, and he was repeatedly thinking about a question: geometric figures are intuitive, while algebraic equations are more abstract, can the equations be represented by geometric figures? Here, the key is how to link the points that make up the geometry to each set of "numbers" that satisfy the equation.

He pondered it desperately. What kind of method can be used to connect "points" and "numbers"? Suddenly, he saw a spider in the corner of the roof, pulling the silk and hanging down, and after a while, the spider climbed up the silk again, pulling the silk left and right.

The spider's "performance" made Descartes' thinking suddenly clear. He thought, you can think of the spider as a point, it can move up, down, left and right in the room, can you use a set of numbers to determine the position of the spider? He also thought that if the corners of the walls on the ground were taken as the starting point, and the three lines handed over were the three number lines, wouldn't the position of any point in the space be represented by the three sequential numbers found on the three number lines?

Conversely, arbitrarily given a set of three ordered numbers, for example, they can also be represented by a point p in space. Similarly, a set of numbers (a, b) can be used to represent a point on a plane, and a point on a plane can be represented by a set of two ordered numbers. So under the inspiration of the spider, Descartes created the Cartesian coordinate system.

The story above makes it clear that the purpose of a coordinate system is to represent equations with geometric shapes.

The quadrant of the coordinate system cannot be changed, it is only recognized. The exams are all used in this way, and you can still take 100 if you change it?

To reverse it, the method and operation steps are as follows:

1. First of all, select the excel sheet and double-click to open it as below screenshot shown.

2. Secondly, after completing the above steps, select the data source cell in which you want to draw the line chart, as shown in the image below.

3. Then, after completing the above steps, click the "2D Line Chart" button in the "Line Chart" of "Insert", as shown in the following figure.

4. Then, after completing the above steps, select the vertical axis and right-click on the "Format Axis" option as shown in the image below.

5. Then, after completing the above steps, check the item "Reverse Sequence Scale Value", as shown in the figure below.

6. Then, after completing the above steps, click the "Close" button as shown in the image below.

7. Finally, after completing the above steps, the ordinate digit sequence of the line chart is successfully reversed, as shown in the figure below. In this way, the problem is solved.

Tools Material: Microsoft Office Excel 2007 Edition, Excel**.

1. First, select Excel** and double-click to open.

2. Secondly, on the window, select the data source cell you want to draw a line chart.

3. Then on the window, click the "2D Line Chart" button in the "Line Chart" in "Insert".

4. Secondly, on the window, select the ordinate axis and right-click the "Set Coordinate Axis Format" option.

5. Then, on the window, check the "Reverse Scale Value" option.

6. Secondly, on the window, click the "Close" button.

7. Finally, on the window, the ordinate digits of the line chart are successfully reversed.

Chart Tools - Design - Toggle Columns and Columns.

In a mathematical coordinate system (i.e., a Cartesian coordinate system), point coordinates are formatted as (x,y). In a geodetic coordinate system (i.e., a geographic coordinate system), point coordinates are formatted as (e,n). Where:

1. E means east, east coordinates.

2. N means north, north coordinates.

The conversion of two sets of coordinate systems stipulates that e is the y coordinate and n is the x coordinate. CAD uses a mathematical coordinate system, and the (x,y) in the design file should be reversed when entering points, i.e., (y,x).

In the mathematical coordinate system (i.e., the Cartesian coordinate system), the format of the point coordinates is (x, y) In the geodetic coordinate system (i.e., the geographic coordinate system), the format of the point coordinates is (e, n) e means east, east coordinates; N means north, the conversion of two sets of coordinate systems of north coordinates, specifying that e is the y coordinate, n is the x coordinate CAD uses the mathematical coordinate system, and the (x, y) in the design file should be reversed when entering the point, that is, (y, x).

It's a mathematical rule, and it has to be arranged in a certain direction. Nothing specific.

Both the planar and three-dimensional coordinate systems are the right-hand rule of the coordinate system.

Clockwise, the vertical axis of the coordinate system is the x-axis, the horizontal axis is the y-axis, the north of the origin of the coordinate system is the positive axis of the x-axis, the east is the y-axis, the x-axis is the starting direction, and the i, ii, iii, and iv quadrants are in the clockwise direction. As shown in the figure below.

The quadrants of the Gaussian plane Cartesian coordinate system are arranged in clockwise order, with the vertical axis being the x-axis (direction north) and the horizontal axis being the y-axis (direction east). Top right of the first quadrant; second quadrant lower right; third quadrant lower left; Top left of the fourth quadrant.

The plane Cartesian coordinates on the measurement are Y, the vertical axis is X, and the plane Cartesian coordinates on the measurement are the opposite of the plane Cartesian coordinates on the measurement, and the positive end of the vertical axis x (referring to the north end) is the azimuth angle of 0°, and the clockwise angle increases, that is, the right end (east end) of the horizontal axis y is 90°, the negative end of the vertical axis (south end) is 180°, and the left end (west end) of the horizontal axis y is ° position, that is, the 360° position, and the mathematical angle is calculated from the right end of the horizontal axis counterclockwise. In this way, the measured planar Cartesian coordinates are exactly the same as the mathematical planar Cartesian coordinates when using trigonometric functions. The two plane Cartesian coordinates are essentially the same, and the purpose of replacing the position of the coordinate axis with the plane Cartesian coordinates on the measurement is in line with people's standard habits of taking north as the standard.

The conversion between the two can be achieved by two rotations, i.e., the mathematical plane Cartesian coordinates are rotated 90° against the clock, at which point the x-axis is facing up (the same as the measurement), but the positive end of the y-axis is facing left; Then, with the x-axis as the axis of rotation, the y-axis is rotated 180°, and the plane Cartesian coordinates on the measurement are obtained. The relative positions of the points in the coordinate system do not change during the whole rotation process, indicating that the Cartesian coordinates of these two planes are indeed essentially the same.

The coordinate axis is different, the horizontal axis is the y-axis and the vertical axis is the x-axis. In mathematics, the horizontal axis is the x-axis and the vertical axis is the y-axis. The quadrants are different, clockwise in measurements and counterclockwise in mathematics. The upper right is the same as the first quadrant.

In terms of application, the Cartesian coordinate system of the plane is the same as the Cartesian coordinate system of the plane in mathematics.

This is a rule, and it doesn't make any sense.

You can think of it this way: the four quadrants on the plane are not exactly the same as "dividing the plane into four parts", but the four quadrants plus the xy axis are a complete plane.

I think it's like zero is neither positive nor negative, it's just a demarcation, and two axes separate the four quadrants as a demarcation.

The ordinate of the Gaussian Cartesian coordinate system is the x-axis, and the abscissa is the y-axis. The coordinate quadrant is divided into four quadrants clockwise. Angles are calculated clockwise from the north of the x-axis, and unlike mathematical coordinate systems, the purpose of this practice is to apply mathematical trigonometry and analytic geometric formulas directly to the calculation of measurements.

You are asking why it can be used directly ... This is the math problem...

You can think about it, the drawing has always been based on the north direction as the standard direction, and all angles are deduced from this direction, which is the same as the mathematical x-axis as the standard direction, in order to make the formula universal, naturally change the coordinate axis direction and quadrant order, if you don't change, it is equivalent to the mathematical coordinate system under the angle from the y-axis directly using the mathematical coordinate system from the x-axis as the standard direction of the trigonometric functions and geometric formulas? Definitely not, if you are unclear, you can continue to ask.