Симметричное построение графика по оси X

Я использую splot для создания тепловой карты из разбросанных точек. То, что у меня есть, это положительная ось x, y как отрицательная, так и положительная, z соответственно. Я хотел бы построить это симметрично по отрицательной оси x. я использовал

set xrange[0:5]
set yrange[-3:3]
set xrange[0:5] reverse
set cbrange[-2:2]
 splot "all.dat" using 1:2:3 notitle with labels

и

Я также использовал изменение 1:2:3 на (-$1):2:3 но я не мог добиться желаемого результата.

несколько точек данных

0.95  -3  0.332246
0.95  -2.95  0.342453
0.95  -2.9  0.352814
0.95  -2.85  0.363333
0.95  -2.8  0.374018
0.95  -2.75  0.384877
0.95  -2.7  0.395919
0.95  -2.65  0.407154
0.95  -2.6  0.418594
0.95  -2.55  0.430251
0.95  -2.5  0.442139
0.95  -2.45  0.454277
0.95  -2.4  0.466682
0.95  -2.35  0.479375
0.95  -2.3  0.492383
0.95  -2.25  0.50573
0.95  -2.2  0.519449
0.95  -2.15  0.533574
0.95  -2.1  0.548143
0.95  -2.05  0.563198
0.95  -2  0.578788
0.95  -1.95  0.594962
0.95  -1.9  0.611778
0.95  -1.85  0.629295
0.95  -1.8  0.647577
0.95  -1.75  0.666692
0.95  -1.7  0.686713
0.95  -1.65  0.707711
0.95  -1.6  0.729761
0.95  -1.55  0.752938
0.95  -1.5  0.777315
0.95  -1.45  0.802964
0.95  -1.4  0.829949
0.95  -1.35  0.858332
0.95  -1.3  0.888166
0.95  -1.25  0.919495
0.95  -1.2  0.952354
0.95  -1.15  0.986765
0.95  -1.1  1.02274
0.95  -1.05  1.06028
0.95  -1  1.09937
0.95  -0.95  1.14
0.95  -0.9  1.18211
0.95  -0.85  1.22568
0.95  -0.8  1.27063
0.95  -0.75  1.3169
0.95  -0.7  1.36441
0.95  -0.65  1.41306
0.95  -0.6  1.46273
0.95  -0.55  1.51331
0.95  -0.5  1.56461
0.95  -0.45  1.61646
0.95  -0.4  1.66864
0.95  -0.35  1.72087
0.95  -0.3  1.77286
0.95  -0.25  1.82431
0.95  -0.2  1.87492
0.95  -0.15  1.92446
0.95  -0.1  1.97287
0.95  -0.05  2.02026
0.95  -9.39526e-15  2.06704
0.95  0.05  2.02026
0.95  0.1  1.97287
0.95  0.15  1.92446
0.95  0.2  1.87492
0.95  0.25  1.82431
0.95  0.3  1.77286
0.95  0.35  1.72087
0.95  0.4  1.66864
0.95  0.45  1.61646
0.95  0.5  1.56461
0.95  0.55  1.51331
0.95  0.6  1.46273
0.95  0.65  1.41306
0.95  0.7  1.36441
0.95  0.75  1.3169
0.95  0.8  1.27063
0.95  0.85  1.22568
0.95  0.9  1.18211
0.95  0.95  1.14
0.95  1  1.09937
0.95  1.05  1.06028
0.95  1.1  1.02274
0.95  1.15  0.986765
0.95  1.2  0.952354
0.95  1.25  0.919495
0.95  1.3  0.888166
0.95  1.35  0.858332
0.95  1.4  0.829949
0.95  1.45  0.802964
0.95  1.5  0.777315
0.95  1.55  0.752938
0.95  1.6  0.729761
0.95  1.65  0.707711
0.95  1.7  0.686713
0.95  1.75  0.666692
0.95  1.8  0.647577
0.95  1.85  0.629295
0.95  1.9  0.611778
0.95  1.95  0.594962
0.95  2  0.578788
0.95  2.05  0.563198
0.95  2.1  0.548143
0.95  2.15  0.533574
0.95  2.2  0.519449
0.95  2.25  0.50573
0.95  2.3  0.492383
0.95  2.35  0.479375
0.95  2.4  0.466682
0.95  2.45  0.454277
0.95  2.5  0.442139
0.95  2.55  0.430251
0.95  2.6  0.418594
0.95  2.65  0.407154
0.95  2.7  0.395919
0.95  2.75  0.384877
0.95  2.8  0.374018
0.95  2.85  0.363333
0.95  2.9  0.352814
0.95  2.95  0.342453
0.95  3  0.332246

0.85  -3  0.335929
0.85  -2.95  0.346217
0.85  -2.9  0.35666
0.85  -2.85  0.367266
0.85  -2.8  0.378042
0.85  -2.75  0.388996
0.85  -2.7  0.400136
0.85  -2.65  0.411474
0.85  -2.6  0.423022
0.85  -2.55  0.434791
0.85  -2.5  0.446798
0.85  -2.45  0.459059
0.85  -2.4  0.471595
0.85  -2.35  0.484425
0.85  -2.3  0.497576
0.85  -2.25  0.511075
0.85  -2.2  0.524954
0.85  -2.15  0.539247
0.85  -2.1  0.553994
0.85  -2.05  0.569237
0.85  -2  0.585024
0.85  -1.95  0.601407
0.85  -1.9  0.618444
0.85  -1.85  0.636193
0.85  -1.8  0.654721
0.85  -1.75  0.674096
0.85  -1.7  0.694389
0.85  -1.65  0.715673
0.85  -1.6  0.738025
0.85  -1.55  0.761517
0.85  -1.5  0.786224
0.85  -1.45  0.812216
0.85  -1.4  0.839559
0.85  -1.35  0.868314
0.85  -1.3  0.898534
0.85  -1.25  0.930263
0.85  -1.2  0.963537
0.85  -1.15  0.998378
0.85  -1.1  1.0348
0.85  -1.05  1.07281
0.85  -1  1.11239
0.85  -0.95  1.15353
0.85  -0.9  1.19619
0.85  -0.85  1.24034
0.85  -0.8  1.28593
0.85  -0.75  1.33289
0.85  -0.7  1.38116
0.85  -0.65  1.43064
0.85  -0.6  1.48125
0.85  -0.55  1.53285
0.85  -0.5  1.58528
0.85  -0.45  1.63836
0.85  -0.4  1.69183
0.85  -0.35  1.74538
0.85  -0.3  1.79861
0.85  -0.25  1.85106
0.85  -0.2  1.90222
0.85  -0.15  1.95164
0.85  -0.1  1.99896
0.85  -0.05  2.04417
0.85  -9.39526e-15  2.08764
0.85  0.05  2.04417
0.85  0.1  1.99896
0.85  0.15  1.95164
0.85  0.2  1.90222
0.85  0.25  1.85106
0.85  0.3  1.79861
0.85  0.35  1.74538
0.85  0.4  1.69183
0.85  0.45  1.63836
0.85  0.5  1.58528
0.85  0.55  1.53285
0.85  0.6  1.48125
0.85  0.65  1.43064
0.85  0.7  1.38116
0.85  0.75  1.33289
0.85  0.8  1.28593
0.85  0.85  1.24034
0.85  0.9  1.19619
0.85  0.95  1.15353
0.85  1  1.11239
0.85  1.05  1.07281
0.85  1.1  1.0348
0.85  1.15  0.998378
0.85  1.2  0.963537
0.85  1.25  0.930263
0.85  1.3  0.898534
0.85  1.35  0.868314
0.85  1.4  0.839559
0.85  1.45  0.812216
0.85  1.5  0.786224
0.85  1.55  0.761517
0.85  1.6  0.738025
0.85  1.65  0.715673
0.85  1.7  0.694389
0.85  1.75  0.674096
0.85  1.8  0.654721
0.85  1.85  0.636193
0.85  1.9  0.618444
0.85  1.95  0.601407
0.85  2  0.585024
0.85  2.05  0.569237
0.85  2.1  0.553994
0.85  2.15  0.539247
0.85  2.2  0.524954
0.85  2.25  0.511075
0.85  2.3  0.497576
0.85  2.35  0.484425
0.85  2.4  0.471595
0.85  2.45  0.459059
0.85  2.5  0.446798
0.85  2.55  0.434791
0.85  2.6  0.423022
0.85  2.65  0.411474
0.85  2.7  0.400136
0.85  2.75  0.388996
0.85  2.8  0.378042
0.85  2.85  0.367266
0.85  2.9  0.35666
0.85  2.95  0.346217
0.85  3  0.335929